Hero Mastery

Keeper of the Light

A light mage: Illuminate channels a line nuke + push, Chakra Magic restores an ally's mana, Blinding Light shoves + causes misses, and Spirit Form supercharges Illuminate.

Mastery parameters

Your XP and damage per game against other Keeper of the Light players — average vs Top 20%. Supports are not graded on GPM.

Members only

Learning 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 Keeper of the Light your mastery hero to start — progress shows on Home and Arcana.

Phase by phase

Laning: zone their carry with your offlaner

You 40%Team 60%

Skills in lane — Pro supports max Chakra Magic (E) first — 63% of 285 games since patch 7.41, then Illuminate (Q). Some max Illuminate (Q) first instead (37%). First talent at level 11.
Illuminate from the fog — Charge Illuminate from the fog then release the big line nuke — clear waves and chunk heroes from safety.

Skills 1–7

Starting items

Iron Branch28%
Tango16%
Circlet of Nobility15%
Faerie Fire13%
Blood Grenade9%
Observer Ward6%

Pros buy this phase

Spirit Vessel50%
Tranquil Boots42%
Boots of Travel4%
Oblivion Staff4%

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.

Counters & weaknesses

Channeling hero

The items that shut Keeper of the Light down, 3 heroes that trouble it, and your answer when you play it.

Members only

Why 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 Keeper of the Light 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.