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Pick another hero

Hero Mastery

Mars

A shielded frontliner: Spear to pin a hero against terrain and Arena of Blood to cage them in with your team.

Pos 3 · Offlaner
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Mastery parameters

Your GPM, last hits and damage per game against other Mars 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 Mars your mastery hero to start — progress shows on Home and Arcana.

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Phase by phase

Laning: pressure their carry, don't feed

You 50%Team 50%

  • Skills in lane — Pro cores max Spear of Mars (Q) first — 84% of 380 games since patch 7.41, then God's Rebuke (W). First talent at level 11.

  • BKB online — teamfights — With BKB you can Blink–Arena into their team without being stunned out. This is your main fight-winning timing.

Skills 1–7

  1. W1
  2. Q2
  3. Q3
  4. W4
  5. Q5
  6. R6
  7. Q7

Starting items

  • Iron Branch30%
  • Gauntlets of Strength28%
  • Tango13%
  • Quelling Blade9%
  • Circlet of Nobility6%
  • Magic Stick5%

Pros buy this phase

  • Phase Boots97%
  • Blink Dagger1%
  • Arcane Boots1%
The Offlaner's job this phase
  • Your goal isn't perfect farm — it's making sure THEIR carry doesn't farm. Contest every last hit.
  • Secure range creeps with a spell if needed; XP matters more than gold for you.
  • If the 1v2 is rough, hug your tower and ask the soft support to help zone.

Mars

Counters & weaknesses

Tank (big HP & armor)

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

Members only
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 Mars 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.