Zac vs Illaoi — Top Lane Matchup Guide

How to win lane as Zac against Illaoi · 47.3% win rate (630 Emerald+ games, lolalytics, sampled July 2026) · Matchup data reviewed on patch 26.15

Verdict: Illaoi is slightly favoured — Zac wins 47.3% of 630 games, and Illaoi pressures 5 of the 7 stage windows in the plan below. Play it patient and win your windows.

At a glance

E-knock her off her field — sustain, fight in the open.

Track: Illaoi's E — Test of Spirit (16–12s cooldown). Her vessel pull. Sidestep it.

Do

E-knock her off her field
Pick up blobs to sustain
Fight away from tentacles

Don't

Fight in her field
Get E’d near a vessel
Brawl her tentacles

Runes & build vs Illaoi

Start: Doran's Shield + Health Potion
First back: Executioner's Calling (≈800g) — cuts her healing
First item: Heartsteel (HP feeds everything)
Then: Spirit Visage / Thornmail
Boots: Plated Steelcaps
Runes: Grasp of the Undying (Resolve): Demolish, Second Wind, Overgrowth · Precision: Triumph, Legend: Haste · Shards: Health Scaling, Adaptive Force, Health

Favour timeline — the windows in Zac's game plan

Read from Zac's seat: which stage windows this plan plays for against Illaoi.

Stage	Favoured	Why
Level 1	Illaoi	Illaoi's Test of Spirit and tentacle smashes out-grind your level-1 kit.
Level 2	Illaoi	At 2 her tentacles plus a 4s Harsh Lesson reset keep trades hers.
Level 3	Illaoi	Level 3 her full tentacle DPS overwhelms you in any extended fight.
Levels 4-5	Illaoi	Levels 4-5 she still wins trades near her tentacles and pressures the wave.
Level 6	Illaoi	At 6 Leap of Faith adds one tentacle per champion — solo, one.
First item	Zac	By first item your tank stats let you survive and leave her ult zone.
Two+ items	Zac	Late, your mobility and tankiness ignore an immobile tentacle-bound Illaoi.

How to beat Illaoi as Zac: the early game

Illaoi bullies levels 1-3 — dodge Test of Spirit (E): the spirit echoes damage back to you, and it dying or you walking too far turns you into a tentacle-spawning Vessel.

Hardest and easiest matchups for Zac in top lane

Pooled Emerald+ win rates from Zac's side, sampled July 2026.

Hardest

Zac vs Cassiopeia — 35.38% win rate
Zac vs Singed — 40.9% win rate
Zac vs Zaahen — 43.23% win rate

Easiest

Zac vs Maokai — 65.75% win rate
Zac vs Mel — 59.83% win rate
Zac vs Sejuani — 59.76% win rate

Read the rest of this matchup

The full Zac vs Illaoi report continues with the mid-game plan, the late-game and teamfight plan, every power spike to play around, and the win conditions for both sides — plus cooldown tracking and the live enemy-jungle tracker inside the app.

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Common questions

Who wins Zac vs Illaoi in top lane?

Illaoi, slightly — Zac wins 47.3% of 630 games; winnable with the right plan.

Is Zac vs Illaoi a skill matchup?

Mostly — Illaoi has a small statistical edge (52.7% win rate), but execution decides this lane far more than the pick does.

Does Zac counter Illaoi?

No — if anything Illaoi has the slight edge (Zac wins 47.3%), though it stays close.

What runes does Zac take vs Illaoi?

Zac takes Grasp of the Undying on the Resolve tree with Demolish, Second Wind and Overgrowth, and Precision secondary (Triumph and Legend: Haste) vs Illaoi.

What should Zac build vs Illaoi?

Start Doran's Shield + Health Potion and back for Executioner's Calling (≈800g) — cuts her healing. Build Heartsteel (HP feeds everything) first, then Spirit Visage / Thornmail, with Plated Steelcaps.

More Zac top lane matchups: vs Graves · vs Gwen · vs Heimerdinger · vs Irelia · vs Jax · vs Jayce