Hero Mastery
A burst witch doctor: Maledict punishes wounded enemies by % HP, Paralyzing Cask bounces a stun, Voodoo Restoration heals an area, and Death Ward rains attacks.
Your XP and damage per game against other Witch Doctor players — average vs Top 20%. Supports are not graded on GPM.
Members only5 stages, each with one target from your own games and one short quiz. Make Witch Doctor your mastery hero to start — progress shows on Home and Arcana.
Sign in through SteamSkills in lane — Pro supports max Maledict (E) first — 94% of 389 games since patch 7.41, then Paralyzing Cask (Q). First talent at level 11.
Cask → Maledict combo — Paralyzing Cask stuns a group, Maledict then punishes their missing HP — a big AoE burst to open a fight.
Skills 1–7
Starting items
Items this phase
Witch Doctor
The items that shut Witch Doctor down, 5 heroes that trouble it, and your answer when you play it.
Members onlyOne hero, one role first
OpenAI's first bot played only Shadow Fiend, only mid, until it mastered it. Stay on Witch Doctor 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.