Matchup

Strong engageHeavy CCVery tankyHigh sustain

Build vs Zac

Build adapted to this matchup

Starting items

Health Potion
x2

Core build

Ardent Censer
1
Shurelya's Battlesong
2
Moonstone Renewer
3HP

Standard

Ionian Boots of Lucidity
4CDR
Dream Maker
5HP

Summoner spells

4786%
3411%

Anti AD

Plated Steelcaps
4vs AD
Knight's Vow
5vs AD

Anti Heal

Morellonomicon
6vs Heal

Anti AP

Mercury's Treads
4vs CC
Jak'Sho, The Protean
5vs Hybride

Other options

Dream Maker
HP
Mikael's Blessing
HP
Redemption
Zaz'Zak's Realmspike
HP
Locket of the Iron Solari
HP
Celestial Opposition
HP
Diadem of Songs
HP
Solstice Sleigh
HP
Staff of Flowing Water
Echoes of Helia
HP
100.0% WR3 games
SorcerySorcery
Summon AerySummon Aery
Manaflow BandManaflow Band
TranscendenceTranscendence
ScorchScorch
ResolveResolve
RevitalizeRevitalize
Bone PlatingBone Plating
Ability HasteAdaptive ForceHealth Scaling

Power Spikes

Strength by game phase

Early (0-15)
Mid (15-30)
Late (30+)
LuluLulu
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