Matchup

Strong engageHeavy CCVery tankyHigh sustain

Build vs Zac

Build adapted to this matchup

Starting items

Doran's Blade
Health Potion

Core build

Black Cleaver
1vs Tank
Sundered Sky
2Bruiser
Chempunk Chainsword
3vs Heal

Standard

Boots of Swiftness
4vs Slow
Eclipse
5DPS

Summoner spells

41494%
4125%

Anti AD

Plated Steelcaps
4vs AD
Death's Dance
5vs AD
Guardian Angel
vs AD

Anti AP

Mercury's Treads
4vs CC
Maw of Malmortius
5vs AP

Anti Tank

Voltaic Cyclosword
5vs Tank
Serpent's Fang
vs Tank
Youmuu's Ghostblade
vs Tank

DPS

Eclipse
DPS
Spear of Shojin
Bruiser
Blade of The Ruined King
DPS

Other options

Sterak's Gage
Survival
100.0% WR1 games
PrecisionPrecision
ConquerorConqueror
Presence of MindPresence of Mind
Legend: HasteLegend: Haste
Last StandLast Stand
SorcerySorcery
TranscendenceTranscendence
ScorchScorch
Adaptive ForceAdaptive ForceHealth Scaling

Power Spikes

Strength by game phase

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

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