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Hero Mastery

Legion Commander

A snowballing duelist: win a Duel and you gain permanent bonus damage — every kill makes you deadlier.

Pos 2 · MidlanerPos 3 · Offlaner
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Mastery parameters

Your GPM, last hits and damage per game against other Legion Commander players — average vs Top 20%.

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Learning journey

  1. 1 Know the kit
  2. 2 Win the lane
  3. 3 Timing & rotations
  4. 4 Win the fights
  5. 5 Master

5 stages, each with one target from your own games and one short quiz. Make Legion Commander your mastery hero to start — progress shows on Home and Arcana.

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Phase by phase

The 1v1: last hits + rune control

You 70%Team 30%

  • Skills in lane — Pro cores max Overwhelming Odds (Q) first — 95% of 303 games since patch 7.41, then Moment of Courage (E). First talent at level 11.

  • BKB online — safe Duel — BKB stops the enemy team from stunning/silencing during your Duel. Pop it first, then Blink–Duel their target.

Skills 1–7

  1. Q1
  2. E2
  3. Q3
  4. W4
  5. Q5
  6. R6
  7. Q7

Starting items

  • Iron Branch33%
  • Gauntlets of Strength20%
  • Tango15%
  • Quelling Blade11%
  • Circlet of Nobility10%
  • Magic Stick8%

Pros buy this phase

  • Phase Boots84%
  • Power Treads8%
  • Blade Mail5%
  • Blink Dagger3%
The Midlaner's job this phase
  • Focus on last hits & denies — a 10-creep lead by minute 5 is a real level advantage.
  • Minutes 6, 8, 10, …: check water/power runes. A full Bottle means you can spam spells.
  • Ask a support to arrive 30 seconds before power runes when your lane is rough.

Legion Commander

Counters & weaknesses

Magic burst hero

The items that shut Legion Commander down, 3 heroes that trouble it, and your answer when you play it.

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Why this way? How OpenAI Five learned

  1. One hero, one role first

    OpenAI's first bot played only Shadow Fiend, only mid, until it mastered it. Stay on Legion Commander in one role before moving on.

  2. 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.

  3. 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.

  4. 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.