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Hero Mastery

Ursa

A single-target killer: Fury Swipes stacks damage per hit, Overpower gives a burst of attack speed, and Enrage makes you nearly unkillable.

Pos 1 · Carry (Safe Lane)Pos 3 · Offlaner
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Mastery parameters

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

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Phase by phase

Laning: last hits above everything

You 80%Team 20%

  • Skills in lane — Pro cores max Fury Swipes (E) first — 88% of 398 games since patch 7.41, then Overpower (W). First talent at level 11.

  • Early Roshan — Ursa kills Roshan very fast thanks to Fury Swipes. Rally your team for an early Aegis and press the map.

Skills 1–7

  1. E1
  2. Q2
  3. E3
  4. W4
  5. E5
  6. R6
  7. E7

Starting items

  • Iron Branch34%
  • Tango16%
  • Quelling Blade14%
  • Magic Stick12%
  • Faerie Fire12%
  • Circlet of Nobility8%

Pros buy this phase

  • Phase Boots57%
  • Perseverance34%
  • Power Treads9%
  • Orb of Corrosion1%
The Carry (Safe Lane)'s job this phase
  • Aim for 45–50 last hits by minute 10 — check that number every game, it's your main KPI.
  • Don't over-harass: trade HP only when it doesn't cost you last hits.
  • Minutes 2 & 4: ask your support to pull so the lane stays near your tower.

Ursa

Counters & weaknesses

Right-click carry (physical damage)

The items that shut Ursa 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 Ursa 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.