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Hero Mastery
Winter Wyvern
A winter dragon: Winter's Curse turns enemies against their own allies, Splinter Blast bounces damage + slows, Cold Embrace heals + grants physical immunity, and Arctic Burn attacks from range.
Mastery parameters
Your XP and damage per game against other Winter Wyvern players — average vs Top 20%. Supports are not graded on GPM.
Members onlyLearning journey
- 1 Know the kit
- 2 Win the lane
- 3 Timing & rotations
- 4 Win the fights
- 5 Master
5 stages, each with one target from your own games and one short quiz. Make Winter Wyvern your mastery hero to start — progress shows on Home and Arcana.
Sign in through SteamPhase by phase
Laning: zone their carry with your offlaner
You 40%Team 60%
Skills in lane — Pro supports max Arctic Burn (Q) first — 95% of 396 games since patch 7.41, then Splinter Blast (W). First talent at level 12.
Level 6 — Winter's Curse — Winter's Curse forces nearby enemies to attack the cursed target — a teamfight ult that flips fights.
Skills 1–7
1
2- 3
4- 5
6- 7
Starting items
Iron Branch28%
Tango15%
Faerie Fire14%
Blood Grenade14%
Smoke of Deceit12%
Sentry Ward9%
Items this phase
- Tango
Clarity
Observer Ward- Sentry Ward
- Iron Branch
Magic Wand
Boots of Speed
The Soft Support's job this phase
- Stand between the enemy carry and the creeps — make them choose between XP and HP.
- Secure the minute-6 power rune for your mid — that's your first rotation.
- Place Observers on rune spots or enemy rotation paths, not random cliffs.
Winter Wyvern
Counters & weaknesses
Fragile hero (easy to catch)
The items that shut Winter Wyvern down, 3 heroes that trouble it, and your answer when you play it.
Members onlyWhy this way? How OpenAI Five learned
One hero, one role first
OpenAI's first bot played only Shadow Fiend, only mid, until it mastered it. Stay on Winter Wyvern in one role before moving on.
Small, measurable rewards
OpenAI Five was rewarded for last hits and staying alive long before it understood winning. That's why each journey stage has one number to hit.
From yourself to the team
Its 'team spirit' rose over the game: early on, look after yourself; late, play for the team. Each phase's meter shows the split.
Use proven builds
OpenAI Five's builds were hand-written, not trial and error. Start from the pro build, then experiment.
Phase items: what pros buy on this hero (OpenDota). Parameters: percentiles of players on this hero (OpenDota). Item effects checked against Valve's own item data.