Matchup

Strong engageHeavy CCVery tankyHigh sustain

Build vs Zac

Build adapted to this matchup

Starting items

Health Potion
x2

Core build

Imperial Mandate
1Mage
Moonstone Renewer
2HP
Mikael's Blessing
3HP

Standard

Ionian Boots of Lucidity
4CDR
Dream Maker
5HP

Summoner spells

4781%
3413%

Anti CC

Mercury's Treads
4vs CC

Other options

Dream Maker
HP
Ardent Censer
Shurelya's Battlesong
Redemption
Echoes of Helia
HP
Solstice Sleigh
HP
Staff of Flowing Water
Zaz'Zak's Realmspike
HP
Celestial Opposition
HP
Diadem of Songs
HP
Morellonomicon
vs Heal
Locket of the Iron Solari
HP
Dark Seal
Dawncore
100.0% WR2 games
SorcerySorcery
Summon AerySummon Aery
Manaflow BandManaflow Band
TranscendenceTranscendence
ScorchScorch
ResolveResolve
RevitalizeRevitalize
Bone PlatingBone Plating
Adaptive ForceAdaptive ForceHealth Scaling

Power Spikes

Strength by game phase

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