Hero Mastery

Jakiro

A two-headed dragon: Ice Path stuns a line, Dual Breath slows + damages, Liquid Fire batters towers + slows attacks, and Macropyre burns a long lane.

Mastery parameters

Your XP and damage per game against other Jakiro 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 Jakiro 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 Liquid Fire (E) first — 78% of 384 games since patch 7.41, then Ice Path (W). First talent at level 11.
Ice Path → Macropyre combo — Ice Path stuns enemies in place, then Macropyre + Dual Breath burn them — an AoE combo that punishes groups.

Skills 1–7

Starting items

Iron Branch23%
Tango15%
Blood Grenade14%
Faerie Fire14%
Sentry Ward10%
Smoke of Deceit9%

Items this phase

Tango
Clarity
Observer Ward
Sentry Ward
Iron Branch
Magic Wand
Boots of Speed

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

Fragile hero (easy to catch)

The items that shut Jakiro down, 4 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 Jakiro 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.