Matchup

Strong engageHeavy CCVery tankyHigh sustain

Build vs Zac

Build adapted to this matchup

Starting items

Doran's Ring
Health Potion
x2

Core build

Oblivion Orb
1
Blackfire Torch
2Mage
Shadowflame
3vs Tank

Standard

Sorcerer's Shoes
4Magic pen
Liandry's Torment
5Mage tank

Summoner spells

41271%
4622%

Anti AD

Plated Steelcaps
4vs AD
Zhonya's Hourglass
5vs AD

Anti Heal

Morellonomicon
6vs Heal

Anti CC

Mercury's Treads
4vs CC

Anti Tank

Void Staff
5vs Tank
Cryptbloom
vs Tank

DPS

Liandry's Torment
Mage tank
Rabadon's Deathcap
Mage
Hextech Rocketbelt
Mage tank
Cosmic Drive
Mage tank
Lich Bane
Mage
Luden's Echo
Mage

Other options

Rod of Ages
HP
Mejai's Soulstealer
100.0% WR2 games
SorcerySorcery
Deathfire TouchDeathfire Touch
Manaflow BandManaflow Band
TranscendenceTranscendence
ScorchScorch
ResolveResolve
Shield BashShield Bash
Bone PlatingBone Plating
Attack SpeedAdaptive ForceHealth Scaling

Power Spikes

Strength by game phase

Early (0-15)
Mid (15-30)
Late (30+)
ViktorViktor
ZacZac
Careful
Careful
Aggressive

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