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Pick another hero

Hero Mastery

Juggernaut

A well-rounded carry with a built-in 'immune' button (Blade Fury) and Omnislash burst — strong from the early game to the late.

Pos 1 · Carry (Safe Lane)
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Mastery parameters

Your GPM, last hits and damage per game against other Juggernaut 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 Juggernaut 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 Blade Fury (Q) first — 84% of 325 games since patch 7.41, then Blade Dance (E). First talent at level 11.

  • Minute 6 — Omnislash — Your first ult is a kill. Spin in to close the gap, then Omnislash an isolated target — you're untargetable during the animation.

  • Maelstrom online — flash farm — Maelstrom turns your farm up to eleven. Take jungle camps between lane pushes and rush your next big item.

Skills 1–7

  1. Q1
  2. W2
  3. Q3
  4. E4
  5. Q5
  6. R6
  7. Q7

Starting items

  • Iron Branch32%
  • Quelling Blade15%
  • Magic Stick14%
  • Tango14%
  • Faerie Fire11%
  • Circlet of Nobility8%

Pros buy this phase

  • Power Treads56%
  • Perseverance29%
  • Phase Boots13%
  • Battle Fury1%
  • Yasha1%
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.

Juggernaut

Counters & weaknesses

Right-click carry (physical damage)

The items that shut Juggernaut 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 Juggernaut 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.