Matchup

Strong engageHeavy CCVery tankyHigh sustain

Build vs Zac

Build adapted to this matchup

Starting items

Doran's Ring
Health Potion
x2

Core build

Blackfire Torch
1Mage
Zhonya's Hourglass
2vs AD
Shadowflame
3vs Tank

Standard

Sorcerer's Shoes
4Magic pen
Luden's Echo
5Mage

Summoner spells

41292%
4218%

Anti CC

Mercury's Treads
4vs CC

Anti Tank

Void Staff
5vs Tank
Stormsurge
vs Tank

DPS

Luden's Echo
Mage
Liandry's Torment
Mage tank
Rabadon's Deathcap
Mage
Horizon Focus
Mage

Other options

Oblivion Orb
100.0% WR1 games
SorcerySorcery
Arcane CometArcane Comet
Manaflow BandManaflow Band
TranscendenceTranscendence
ScorchScorch
PrecisionPrecision
Presence of MindPresence of Mind
Coup de GraceCoup de Grace
Adaptive ForceAdaptive ForceHealth Scaling

Power Spikes

Strength by game phase

Early (0-15)
Mid (15-30)
Late (30+)
ZiggsZiggs
ZacZac
Neutral
Neutral
Neutral

Zac's abilities

Passive, spells and ultimate

Cell Division (P)

Each time Zac hits an enemy with an ability, he sheds a chunk of himself that can be reabsorbed to restore Health. Upon taking fatal damage, Zac splits into 4 bloblets that attempt to recombine. If any bloblets remain, he will revive with an amount of Health depending on the Health of the surviving bloblets. Each bloblet has a percentage of Zac's maximum Health, Armor and Magic Resistance. This ability has a 5 minute cooldown.

Cooldowns

Cooldowns by spell rank

LevelQWER
314s5s22s
611s5s22s2m
98s5s22s2m
118s5s22s1m45
168s5s16s1m30
188s5s10s1m30

Playing against Zac

How to counter and exploit weaknesses

1

Walk on his blobs (passive) to destroy them and prevent him from healing.

2

His E is long range but visible and has a windup: side-step when you see him charging.

3

If Zac dies, he splits into blobs that reform: kill all 4 blobs to kill him for good.

4

His engage is strong but he's vulnerable to burst once inside — focus him after his engage.

Source: op.gg + LTL Engine · Patch 16.9.1 · May 9, 2026