How to Master Winter Wyvern in Dota 2: The Ultimate Guide for Every Rank (2026)

Why Winter Wyvern Is Dota’s Most Underrated Support

Winter Wyvern (Auroth) is a ranged intelligence support who typically plays position 4 or 5. She is defined by her ability to swing team fights with a single spell and keep her allies alive through burst damage. Currently sitting at a 52-53% win rate across all brackets on Dotabuff, she consistently overperforms relative to her pick rate — a classic sign of a strong hero that most players underestimate.

What makes Winter Wyvern unique is her dual identity. She functions as both a defensive save support (Cold Embrace) and an aggressive team fight initiator (Winter’s Curse). Very few heroes in Dota can fill both roles simultaneously. She does not need expensive items to be effective, her spells scale well into the late game, and her level 25 talents can be game-changing.

In the current meta, Winter Wyvern thrives against physical damage-heavy lineups. Teams that draft heroes like Phantom Assassin, Ursa, or Troll Warlord — all of whom deal massive physical DPS — are playing directly into her strengths. Cold Embrace completely nullifies their damage on a saved target, and Winter’s Curse turns their own damage against them.

Strengths and Weaknesses

Abilities Deep Dive

Arctic Burn (Q)

Arctic Burn transforms Winter Wyvern into a flying unit for up to 8 seconds, granting 275 bonus attack range (for a total of 725 attack range), night vision, and the ability to fly over terrain. Each attack during Arctic Burn applies a debuff that burns 6% of the target’s current HP per second for 5 seconds as magical damage, and also slows movement speed by 19-40% depending on skill level.

The hidden power of Arctic Burn lies in the details. The percentage-based burn damage means it is most effective against high-HP targets — hitting a 3,000 HP Pudge deals significantly more tick damage than hitting a 1,000 HP Crystal Maiden. The attack during flight also pierces evasion since the range increase is not a projectile change but a stat modification. During Arctic Burn, Winter Wyvern gains flying movement, meaning she can cross cliffs, trees, and impassable terrain freely.

Key interaction: The burn debuff from multiple attacks does not stack in damage — it refreshes the duration. However, each attack applies the slow independently. This means you want to spread your attacks in Arctic Burn across multiple enemy heroes rather than focusing one target, maximizing the total damage and slow output in team fights.

Splinter Blast (W)

Splinter Blast launches a ball of ice at an enemy unit, which then splits and hits every enemy unit within a 500 radius of the primary target. The split projectiles deal 100-340 magical damage and apply a 30% slow for 4 seconds. Crucially, the primary target takes no damage — only surrounding units do.

This ability is Winter Wyvern’s bread and butter for wave clear and team fight poke. The key mechanic most players miss: you can target a creep standing near enemy heroes to guarantee the splash hits them. Casting Splinter Blast on a ranged creep near an enemy carry during laning phase is devastating, because the carry cannot dodge the split projectiles. They simply track and hit.

At max level, Splinter Blast deals 340 damage in an AoE on a 5-second cooldown. That is 272 damage after base magic resistance to every hero caught, every 5 seconds. For a support spell, this is absurd damage output. It also clears entire creep waves, making Winter Wyvern one of the best de-pushing supports in the game.

Advanced tip: Splinter Blast projectiles have a travel time from the primary target to secondary targets. This means you can cast it on a unit, and the splits will hit enemies who walk into range after the initial cast. Timing Splinter Blast on a creep right before a team fight engagement can catch enemies off guard as they close distance.

Cold Embrace (E)

Cold Embrace encases an allied hero (or Winter Wyvern herself) in a block of ice for 4 seconds. During this time, the target is completely immune to physical damage and heals for 3-6% of their max HP per second plus a flat 30-60 HP per second. However, the target cannot move or act and is still vulnerable to magical and pure damage.

This ability is what separates good Winter Wyvern players from great ones. Cold Embrace is simultaneously one of the best save abilities in the game and one of the most dangerous. Using it at the wrong time — say, when the enemy Lina or Leshrac is nearby — gives them a 4-second stationary target to dump all their magic damage into. The frozen ally literally cannot run.

When to use Cold Embrace:

• Your carry is being hit by right-click heroes and would die without the save
• Physical burst damage is incoming (Phantom Assassin crit, Ursa Overpower)
• An ally is running from auto-attacks and needs to heal up
• Self-cast when you are being focused by right-click heroes and your team can follow up

When NOT to use Cold Embrace:

• Enemy has heavy magic damage that can kill through the ice
• Ally is about to use a key spell or BKB and needs to stay active
• In the middle of your team’s aggressive push when the ally should be hitting
• When enemies have Eul’s Scepter, Halberd, or disables ready to chain after the ice ends

Critical interaction: Cold Embrace removes most debuffs on cast. It will purge slows, DoTs, and many disables. This makes it valuable even when the physical immunity is not needed — sometimes the dispel alone saves a life. However, it does not remove all debuffs — things like Doom, Ice Blast (Ancient Apparition’s ultimate which prevents healing entirely and kills at the threshold), and certain other strong dispels will persist through Cold Embrace.

Winter’s Curse (R) — Ultimate

Winter Wyvern’s ultimate is the crown jewel of her kit. Winter’s Curse targets an enemy hero, stunning them for 3.25-5.25 seconds while forcing all nearby enemy heroes within a 525 radius to attack the cursed target. The attacking enemies gain +70 bonus attack speed during the curse. The cursed target takes full damage from their own allies.

This ultimate is devastating for one simple reason: it forces the enemy team to kill their own core. A Winter’s Curse on an enemy carry who is standing next to their other core heroes will result in that carry being annihilated by their own team’s damage. The bonus attack speed means they attack faster than normal, and all their damage items, crits, and procs are fully active against the cursed target.

Key mechanics to remember:

• Only enemy heroes (and illusions and hero-controlled units) are forced to attack the cursed target — creeps are not affected
• The cursed target is stunned for the full duration — they cannot BKB, use items, or cast spells
• Attacking heroes are not stunned — they are taunted. They can still be targeted by your team’s spells
• The taunt pierces spell immunity. Even BKB’d heroes will be forced to attack if they are in range when the curse lands on a nearby ally
• Linken’s Sphere blocks Winter’s Curse on the primary target
• The 525 AoE taunt radius is checked at cast time — heroes who enter the radius after the cast are not affected

Item Builds by Rank Bracket

Winter Wyvern’s item builds shift significantly by rank bracket. Lower ranks need more survivability because fights are chaotic and positioning is inconsistent. Higher ranks prioritize utility and timing because players know how to play around her abilities.

Why Item Builds Differ by Rank

Herald-Crusader: At lower ranks, fights are messy and drawn-out. Glimmer Cape is the most impactful item because it provides both a save for allies and a personal escape. Players at this bracket rarely buy detection, making Glimmer extremely effective. Arcane Boots solve mana problems that lower-ranked players struggle with, since they tend to spam spells inefficiently.

Archon-Legend: Players start to buy detection and punish positioning mistakes. Force Staff becomes essential for saving yourself and allies from ganks. Holy Locket amplifies Cold Embrace healing significantly and is a strong alternative to Glimmer if the enemy already has detection. Aghanim’s Scepter becomes realistic as games go later and you accumulate more gold.

Ancient-Divine: Tranquil Boots are preferred here because experienced players manage mana through Clarities and positioning, while the movement speed helps with rotations. Urn into Holy Locket is the standard progression for maximizing Cold Embrace healing. Force Staff or Blink provides the positioning needed to land Winter’s Curse on key targets.

Immortal: The highest-level players prioritize Blink Dagger as a late-game luxury because it allows for game-winning initiations. A Blink into Winter’s Curse on an enemy carry clustered with allies is an instant team fight win. Refresher Orb for double Winter’s Curse in a single fight is the ultimate late-game power spike — two team fight-winning ultimates back to back.

Aghanim’s Scepter and Shard

Aghanim’s Scepter upgrades Arctic Burn to become a toggle ability with no cooldown, permanently granting the flight and bonus range. This fundamentally changes Winter Wyvern’s playstyle, turning her into a constant harassment machine who can fly over terrain and poke from extreme range. The scepter is particularly strong in late-game scenarios where sieging high ground becomes critical — flying over trees and cliffs to burn enemies from angles they cannot reach.

Aghanim’s Shard upgrades Splinter Blast to also damage the primary target. This is a significant farming and damage increase. Before the Shard, you could not damage the primary target at all, which limited your kill potential in 1v1 scenarios. With Shard, Splinter Blast becomes a legitimate nuke on a 5-second cooldown that hits everyone including the primary target.

Laning Phase Masterclass

Winter Wyvern is one of the strongest laners among support heroes, and much of that power comes from understanding how to abuse Arctic Burn and Splinter Blast timing. Your laning approach changes depending on whether you are playing as a hard support (position 5) in the safe lane or a soft support (position 4) in the offlane.

Safe Lane (Position 5)

As a position 5, your primary job is to zone the enemy offlaner and secure your carry’s farm. Arctic Burn is your best tool for this. At level 1, activate Arctic Burn and fly toward the enemy offlaner, landing 2-3 attacks while they try to last hit. The percentage-based burn damage and slow will force them to use regen or retreat. The flying movement lets you chase over terrain if they try to juke into trees.

Level 1 Arctic Burn harassment pattern:

1. Stand in the trees behind the enemy offlaner’s position
2. Activate Arctic Burn when the offlaner moves up for a last hit
3. Fly out and land 2-3 attacks, applying the burn debuff
4. Retreat before the burn expires and the cooldown starts
5. Repeat when Arctic Burn is available again (22-second cooldown at level 1)

At level 3, you typically have 2 points in Arctic Burn and 1 in Splinter Blast (or 1-1-1 if you need Cold Embrace early). Now you can combine both: use Splinter Blast on a nearby creep to slow and damage the offlaner, then follow up with Arctic Burn attacks for the kill or a forced retreat.

Offlane (Position 4)

Position 4 Winter Wyvern is more aggressive. Paired with tanky offlaners like Mars, Axe, or Tidehunter, your job is to harass the enemy carry and force them out of lane. Splinter Blast is your primary harassment tool here — target the ranged creep near the enemy carry and watch them eat 100-200 damage every time your W is off cooldown.

The risk in the offlane is that you push the wave with Splinter Blast. To counteract this, only use Splinter Blast when the enemy heroes are near the creep wave. If they back off, stop casting it and save your mana. Every Splinter Blast that hits heroes is worth the mana. Every one that only hits creeps is wasted.

Skill Build by Role

Why max Splinter Blast first The damage scaling is enormous (100/170/240/340), and the cooldown decreases from 7 to 5 seconds. No other support spell gives you this much AoE damage on such a short cooldown at early levels. Arctic Burn is taken early for lane harassment but one point is sufficient — the percentage burn does not increase with levels, only the slow and duration.

Lane Partner Synergies

Winter Wyvern pairs exceptionally well with cores who want to fight in lane and can capitalize on her slows and harassment:

• Mars: Arena of Blood into Winter’s Curse is devastating. Mars can also protect Wyvern with his shield during Arctic Burn dives.
• Juggernaut: Blade Fury with Arctic Burn slow guarantees kills. Cold Embrace saves Jugg during risky Omnislash dives.
• Ursa: Arctic Burn slow sets up Ursa’s Overpower attacks perfectly. Cold Embrace saves Ursa after aggressive Enrages.
• Axe: Call into Winter’s Curse chains stuns for a combined 7+ seconds of lockdown. Enemies cannot survive this.

Mid and Late Game Transitions

Winter Wyvern transitions from a lane bully to a team fight controller as the game progresses. Your role in the mid game (15-30 minutes) is to secure objectives through smart spell usage and catch enemies with Winter’s Curse during rotations. In the late game (30+ minutes), you become a backline support whose ultimate can end fights before they begin.

Mid Game (15-30 Minutes)

During the mid game, your primary focus should be:

• Tower pushes and de-pushes: Splinter Blast clears waves incredibly fast. Use it to push out lanes before your team groups for an objective, or to defend towers when the enemy is pressuring.
• Smoke ganks: Winter Wyvern is excellent in smoke ganks because Winter’s Curse provides guaranteed lockdown. Position at the back of the smoke train and wait for your initiator to go in before committing your ultimate.
• Vision control: Use Arctic Burn’s flying vision to scout areas before your team moves in. The flying movement lets you safely deward high-ground wards that would normally require a sentry + quelling blade.

Team fight positioning in the mid game is critical. You want to be behind your cores but within cast range of both Winter’s Curse (800 range) and Cold Embrace (1000 range). The ideal position is at the edge of the fight where you can Curse a clumped enemy carry, Cold Embrace your carry if they get jumped, and throw Splinter Blasts into the chaos.

Late Game (30+ Minutes)

In the ultra-late game, Winter Wyvern becomes one of the most impactful heroes in Dota. A single well-placed Winter’s Curse can end the game. Here is what changes:

1. BKB timing awareness: By 30+ minutes, most cores have BKBs. Remember that Winter’s Curse’s taunt pierces spell immunity. Even a BKB’d enemy will be forced to attack their cursed ally. However, the curse itself is blocked by BKB on the primary target. This means you want to Curse the enemy hero who does NOT have BKB active — their BKB’d allies will still be taunted and forced to attack.

2. High ground defense: Winter Wyvern is one of the best high ground defenders in the game. Splinter Blast spam clears siege creeps, Cold Embrace saves the hero tanking tower damage, and a well-timed Winter’s Curse on an overextending enemy under your tower can result in a team wipe. Many games have been won by a Winter Wyvern stalling high ground for 10+ minutes until her team’s carry comes online.

3. Roshan fights: The narrow Roshan pit is the perfect environment for Winter’s Curse. Enemy heroes are forced into close proximity, making multi-hero taunts almost guaranteed. A Curse on the enemy carry inside the Rosh pit with 3 allies nearby will result in an instant kill.

Key Timing Windows

Counters: Heroes That Destroy Winter Wyvern

Understanding Winter Wyvern’s counters is essential for knowing when to pick her and when to avoid her. These five heroes make Winter Wyvern’s life miserable:

1. Ancient Apparition

The hardest counter in the game. Ice Blast prevents all healing, which completely negates Cold Embrace’s primary function. A Cold Embrace’d ally hit by Ice Blast will not heal and is stuck in place for 4 seconds — a death sentence. Ancient Apparition also deals magic damage, which pierces Cold Embrace’s physical immunity. If the enemy drafts AA, think twice about picking Winter Wyvern.

2. Oracle

Oracle’s False Promise can save the Winter’s Curse target from dying during the taunt duration. His Fate’s Edict makes the cursed ally immune to physical damage from their taunted teammates, effectively nullifying your entire ultimate. Oracle also has Purifying Flames for magic damage that burns through Cold Embrace.

3. Nyx Assassin

Nyx punishes Winter Wyvern’s high intelligence stat with Mana Burn, which deals damage based on the target’s intelligence. Carapace reflects Splinter Blast damage and stuns you from long range. Vendetta provides an easy initiation on the squishy, slow Wyvern who often positions at the back of fights.

4. Huskar

Huskar deals primarily magic damage through Burning Spears and his ultimate Life Break. Cold Embrace does nothing against Huskar’s damage — the frozen ally is just a stationary target for Burning Spear stacking. Huskar also tends to be isolated from his team (diving in alone), making Winter’s Curse less effective since there are fewer allies nearby to taunt.

5. Enigma

Enigma’s Black Hole punishes Winter Wyvern’s backline positioning. She is often grouped near her own team, making her vulnerable to a well-positioned Black Hole that catches multiple heroes. Midnight Pulse also deals percentage-based pure damage that kills through Cold Embrace. Enigma forces Winter Wyvern into impossible positioning decisions.

How to Play Around Counters

If you are already locked into Winter Wyvern against a counter, here is how to adapt:

• Against Ancient Apparition: Play further back and avoid Cold Embracing allies who are tagged by Ice Blast. Focus on Winter’s Curse for team fight impact instead of saves.
• Against Oracle: Coordinate with your team to bait False Promise before using Winter’s Curse. Or Curse a target far from Oracle’s cast range.
• Against Nyx: Buy Force Staff early. Save Arctic Burn for escape when Nyx reveals. Ward defensively to spot Vendetta approaches.
• Against Huskar: Avoid Cold Embracing allies Huskar is targeting. Focus Winter’s Curse on Huskar himself when he dives in — his own team often follows.
• Against Enigma: Spread your positioning away from your own team. If Enigma Black Holes your cores, you should be outside the radius to counter-initiate with Winter’s Curse.

Heroes Winter Wyvern Destroys

Winter Wyvern is not just about surviving — she actively counters several popular heroes. These are the matchups where picking Winter Wyvern gives you a massive advantage:

1. Phantom Assassin

PA deals exclusively physical damage. Cold Embrace completely negates her entire kit — Stifling Dagger, Phantom Strike attacks, and even 2,000 damage crits all bounce off harmlessly. Winter’s Curse on PA when she jumps into your team forces her own allies to hit her with the bonus attack speed, and PA has notoriously low HP pool despite her high evasion. Evasion does not help when your own team is hitting you.

2. Ursa

Ursa’s entire damage output is physical. Cold Embrace completely neutralizes his Overpower burst. Winter’s Curse on Ursa when he Enrages and dives in turns his damage against his team. Even with Enrage active (which reduces damage taken), his allies are still forced to attack him. Ursa also tends to clump with supports during Rosh attempts — perfect Winter’s Curse bait.

3. Troll Warlord

Troll Warlord’s Battle Trance gives him maximum attack speed, but during Winter’s Curse, that attack speed is redirected at his own cursed ally. He literally kills his own teammate faster during his ultimate. Cold Embrace shuts down his right-click damage entirely, and he has no magic damage to threaten frozen targets.

4. Meepo

Multiple Meepo clones in close proximity is the perfect Winter’s Curse setup. Curse one Meepo clone and all nearby clones are taunted to attack it. Since killing any Meepo clone kills the hero, the entire enemy team essentially deletes itself. Meepo cannot play around this without splitting his clones so far apart they lose their power.

5. Phantom Lancer

Splinter Blast is one of the best illusion-clearing abilities in the game. A single cast wipes out an army of PL illusions. Cold Embrace protects your carry from PL’s physical damage swarm. Winter’s Curse on the real PL forces his own illusions to attack him — and since there are often 10+ illusions nearby, the burst damage is enormous.

How Pros Play Winter Wyvern in the Current Patch

Winter Wyvern sees consistent pro play as a niche counter-pick rather than a first-phase hero. Pro teams draft her specifically against physical damage-heavy lineups or when they need a defensive support who can also initiate.

In recent competitive matches, players like Puppey (Team Secret) and Cr1t- (EG legacy) have demonstrated Winter Wyvern’s potential. The common pro pattern is:

• Laning: Aggressive position 4 with early Splinter Blast max, focusing on shoving waves and creating map pressure
• Mid game: Transition to backline positioner with Tranquil Boots + Urn, looking for pick-off Winter’s Curse opportunities during smoke rotations
• Late game: Holy Locket for amplified Cold Embrace saves, followed by Aghanim’s Scepter for permanent Arctic Burn in sieges

Pro players almost always skip Glimmer Cape on Winter Wyvern, unlike pub builds. The reasoning: at the pro level, detection is always available, and Glimmer’s value decreases significantly. Instead, they rush Holy Locket because the amplified healing on Cold Embrace creates a much larger effective HP swing that does not get countered by a 75-gold Dust.

One notable trend in recent patches is pro players using Winter Wyvern as a Roshan zone controller. Before committing to a Rosh fight, they fly over the pit with Arctic Burn to scout, then position outside the pit entrance with Winter’s Curse ready. If enemies contest, the narrow pit entrance ensures multi-hero taunts. This strategy has led to multiple game-defining Roshan fights where a single Winter’s Curse inside the pit ended the contest instantly.

Check Winter Wyvern on Liquipedia for the latest tournament pick and ban data.

Rank-Specific Climbing Guide

Herald to Guardian: Foundation Basics

At this bracket, the most important thing is staying alive and using your spells correctly. Do not worry about advanced positioning or ability interactions — focus on these fundamentals:

• Always carry a TP scroll. You are a support. You need to be able to rotate to save teammates or defend towers.
• Use Splinter Blast on cooldown during fights. Target the creep or hero nearest to the most enemies. Do not hold it — the 5-second cooldown means you get multiple casts per fight.
• Cold Embrace your carry when they are about to die. Do not overthink it at this rank — if your carry is getting hit and might die, ice them. The healing will save them more often than not.
• Winter’s Curse when enemies group up. At Herald-Guardian, enemies clump constantly. A Curse on any hero near 2+ allies is a good Curse.
• Buy Observer and Sentry Wards. Vision wins games at every rank, but especially here where nobody else buys wards.

Crusader to Archon: Adding Game Sense

At this level, you need to start thinking about when to use your spells, not just using them reflexively:

• Cold Embrace decision-making: Start checking the enemy lineup for magic damage before you Cold Embrace. If the enemy Lina has Laguna Blade ready, icing your carry might kill them instead of saving them.
• Splinter Blast targeting: Instead of just hitting the nearest enemy, target creeps near enemy heroes to guarantee the splash damage. This is a significant damage increase.
• Winter’s Curse target selection: Start targeting the enemy carry specifically. A Curse on the enemy position 5 is wasted — you want to Curse the PA standing next to her team so her allies kill her.
• Positioning: Stay behind your frontline. You are squishy and slow. If you die before using Winter’s Curse, you have failed the team fight.

Legend to Ancient: The Macro Leap

This is where Winter Wyvern mastery starts to separate good players from great ones:

• Pre-fight positioning: Before a fight starts, position yourself at the fight’s edge with Winter’s Curse range covering the enemy carry’s likely position. Think about where the carry will stand during the fight and pre-position yourself.
• Cold Embrace timing: Stop using Cold Embrace reactively. Start using it preemptively — icing your carry the instant the enemy PA blinks in, before the crit even lands. This requires reading enemy initiation patterns.
• Map awareness: Use Arctic Burn for scouting, not just harassment. Fly over Rosh pit to check, fly over tree lines during ganks, use the flying vision to deward safely.
• Itemization flexibility: Stop building the same items every game. Against heavy magic lineups, skip Glimmer and rush Force Staff. Against split-pushers, consider BoTs for map presence.

Divine to Immortal: What Separates the Top 1%

At the highest level, Winter Wyvern is about perfect execution and game-ending decisions:

• Curse target priority: Always Curse the hero with the most physical damage allies nearby. Sometimes that means cursing the enemy position 5 who is standing next to their PA and Troll — not the carry themselves. The damage the carry and Troll deal to the cursed support will kill them in 2 seconds, removing a hero from the fight.
• Blink Curse initiations: With Blink Dagger, you can initiate fights with Curse from fog. Walk into tree line, Blink forward, Curse the carry, then immediately Arctic Burn to fly away. Your team follows up on the stunned and taunted enemies.
• Cold Embrace bodyblocking: Self-cast Cold Embrace in narrow pathways to block enemy movement while your team escapes or repositions. The frozen body creates impassable terrain for 4 seconds.
• Refresher timing: With Refresher Orb, wait for the first Winter’s Curse to end, then immediately cast the second one on a different target. Back-to-back 5-second taunts with no gap is 10 seconds of enemy team chaos — no team survives this.

Tips and Tricks

These are the mechanics and interactions that separate casual Winter Wyvern players from true masters of the hero:

Animation Cancels and Hidden Interactions

• Splinter Blast can be cast during Arctic Burn flight. You do not need to stop flying to cast W. Use this to simultaneously harass with attacks and nuke with Splinter Blast during Arctic Burn.
• Cold Embrace cancels channeled abilities when cast on allies. If your ally is channeling an unwanted TP or spell, you can Cold Embrace them to break it (though this is rarely beneficial — be careful).
• Winter’s Curse goes through Fog of War. If you know an enemy hero is in a specific spot (through ward vision or prediction), you can Curse them even if you do not have direct vision. The spell only requires targeting the ground within range.
• Arctic Burn gives flying vision. This means you reveal invisible units, high ground, and warded areas while flying. Use this to deward aggressively without needing a Sentry Ward to spot the observer first.
• Cold Embrace dispels on cast. If an ally is affected by Halberd, Spirit Vessel, or other purgeable debuffs, Cold Embrace removes them. This hidden interaction saves lives more than most players realize.

Common Mistakes to Avoid

1. Cursing isolated heroes: Winter’s Curse on a hero with no allies nearby is just a long stun with zero damage. Wait for enemies to group before using it.
2. Cold Embracing allies against magic burst: The number one Winter Wyvern misplay. Always check if the enemy has Lina, Lion, Skywrath, or other magic nukers ready to dump damage on your frozen ally.
3. Using Arctic Burn aggressively with no escape plan: Flying into 5 enemy heroes for 3 auto-attacks is not worth dying for. Arctic Burn gives you range — use it at max range, not in melee.
4. Holding Winter’s Curse too long: Many Wyvern players wait for the “perfect” Curse and never use it. A Curse that hits 2 heroes is better than a Curse you never cast. Use it.
5. Ignoring Splinter Blast wave clear: Your W is your farming and pushing tool. Use it to shove waves into enemy towers between fights. Do not just save it for team fights.

Advanced Mechanics Only High-MMR Players Know

• Curse into Roshan: If the enemy is doing Roshan and you Curse a hero inside the pit, Roshan will also attack the cursed target since all units in the vicinity turn on them. The Roshan damage combined with ally damage often results in an instant kill.
• Splinter Blast vision: The split projectiles provide brief vision of the area they travel through. Use this to scout into fog during chases or pushes.
• Arctic Burn cliff positioning: During Arctic Burn, fly to a cliff or elevated terrain. When the flight ends, you remain on the cliff. This gives you a high-ground position for casting spells safely. Carry a TP scroll to get down, or wait for the next Arctic Burn cooldown.
• Cold Embrace under tower: When an enemy dives your tower, Cold Embrace yourself or the ally being dived. The tower continues to attack the diving enemy for 4 seconds while your hero is immune to physical damage and healing. The diver often dies to tower shots.
• Stacking camps with Splinter Blast: You can stack ancient camps while farming nearby by timing Splinter Blast to hit the camp at the stack timing (x:55). The slow from Splinter Blast does not prevent stacking because the creeps still move far enough.