Zac’s passive is “Cell Division”, which increases your survivability through 2 effects. Firstly, Zac loses a chunk of himself every time he hits an opponent with an ability. These clumps can be picked up again, which heals Zac by a percentage of his health points. The other effect of the passive occurs when Zac takes fatal damage. If his passive is ready, he first disintegrates into 4 lumps instead of dying immediately. These clumps try to reunite and if your opponents do not manage to destroy all the clumps within a few seconds, Zac will be revived. This part of the passive has a cooldown time of 5 minutes and how many health points Zac regains when he is revived depends on how many remaining health points the clumps were able to reunite with. Each lump has 12% of Zac’s maximum health points and 50% of his resistances. This passive allows you to engage very aggressively as long as you have support from your team. If things do get tight, the passive buys your team a lot of time to win the fight. Team members can also use the teleport summoner spell to keep your lumps alive for longer and ensure you revive. Zac also has a hidden passive that increases his appearance and hitbox as his maximum health increases.

At level 1, you skill Zac’s W “Unstable Matter”, which causes Zac to explode when activated, dealing a percentage of his maximum health as damage to nearby enemies. The cooldown of this ability is 5 seconds, but is reduced by 1 second each time Zac picks up a lump from his passive. In addition, the percentage damage to minions and jungle monsters is capped at 200 points, as Zac could otherwise defeat epic monsters and super minions far too quickly. This ability gives you a constant damage output, allowing you to keep working on your opponents in long fights. It is maximized second, as the cooldown is not reduced by additional ability points.

At level 2, you then take Zac’s Q “Stretch Strike”. When activated, Zac stretches an arm in the selected direction, slowing the first enemy hit and dealing magic damage. In addition, his arm sticks to the enemy and Zac’s next autoattack gains additional range, deals the same additional damage and also slows. If Zac performs this next autoattack on another opponent, he hurls both opponents towards each other. If the two collide with each other, both of them and all other surrounding enemies will receive additional magic damage and will also be slowed. The strength of the slow is 40%. You usually follow up your Engage with this ability to CC one or two of your opponents further. It is also good for peeling your carries in front of enemy divers. As the damage does not increase very much with additional ability points, maximize this ability last.

As soon as you reach level 3, complete your set of basic abilities with Zac’s E “Elastic Slingshot”. If you hold down this ability, Zac will anchor his arms to the ground and tense up to fling himself towards the selected target as soon as you release the E. In the first 0.9 seconds, the range of the E increases the longer you hold it down. At the target location, Zac deals magic damage to all enemies hit and throws them into the air for 1 second. Zac creates an additional lump, which he can collect, for each enemy champion he hits. This ability can be canceled by a move command, in which case half the cooldown and health cost is refunded. The maximum range of his E also increases with additional ability points, which is why you maximize the E first.

Zac’s ultimate ability “Hop Let’s Go!” can be leveled as usual at levels 6, 11 and 16. This ultimate initially has a passive effect that increases the healing of your passives for each lump you collect. This means that Zac’s sustain gets stronger with every point in his ult. When the ult is activated, Zac jumps, bouncing 4 times, flinging enemies he hits into the air and slowing them by 20% for 1 second. Each bounce deals magic damage to enemies, with increased damage for the first hit and only the first hit per enemy throws them into the air. While hopping, Zac gains additional movement speed, which increases from 20% to 50%, and can continue to activate his W. With this ult, you therefore have a good follow-up to continue CCing your opponents after your E-Engage (and possibly your Q). It is also excellent for interrupting enemy engages and zoning opponents.