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.
QStretching Strikes14/12.5/11/9.5/8s
Zac stretches an arm, grabbing an enemy. Attacking a different enemy will cause him to throw both targets towards each other.
WUnstable Matter5s
Zac explodes outward towards nearby enemies, dealing a percentage of their maximum health as magic damage.
EElastic Slingshot21/18/15/12/9s
Patch history
26.15 · Jul 29, 2026
Stats
Armor growth increased to 5.2 from 4.7.
Elastic Slingshot
Cooldown reduced to 21 to 9 seconds from 22 to 10.
26.9 · Apr 29, 2026
Cell Division
Bug Fix: No longer denies kill credit to enemies if Zac has equipped Last Stand.
26.5 · Mar 4, 2026
Elastic Slingshot
Base stats
Health685 +109/lvl
Attack Damage60 +3.4/lvl
Attack Speed0.736 +1.6/lvl
Armor33 +5.2/lvl
Magic Resist32 +2.05/lvl
Base Health Regen5 +0.5/lvl
Move Speed340
Range175
Melee · Resource: Health
Zac attaches his arms to the ground and stretches back, launching himself forward.
RLet's Bounce!120/105/90s
Zac bounces four times, knocking up enemies hit and slowing them.
Bug Fix:
Fixed a bug where it could be heard in Fog of War by nearby enemies.
26.4 · Feb 19, 2026
Stretching Strikes
Base damage increased to 60 to 180 from 40 to 100.
Damage health ratio changed to 3% bonus health from 3% maximum health.
Let's Bounce!
Initial base damage reduced to 120 to 260 from 140 to 280.
Subsequent base damage reduced to 60 to 130 from 140 to 280.
Maximum base damage reduced to 300 to 650 from 350 to 700.
25.19 · Sep 24, 2025
Stretching Strikes
Tooltip now notes the maximum single-target damage from all parts of the ability instead of noting the ability can deal damage at least three times (300%) when two separate enemies are slammed while at least one enemy is between them.
35 older patches
25.18 · Sep 10, 2025
Let's Bounce!
New Effect: Now grants ghosting during the effect.
25.16 · Aug 13, 2025
Let's Bounce!
Undocumented / Bug Fix: Tooltip damage calculations now properly take into account his ability power (instead of incorrectly adding the ability power ratio values alone).
25.13 · Jun 25, 2025
Cell Division
Bug Fix: Dying to Nexus Obelisk damage no longer triggers Cell Division's resurrection.
14.23
Stretching Strikes
Health ratio reduced to 3% of his maximum health from 4%.
14.13
Cell Division
Heal changed to 4% to 8%maximum health from 5% to 8%.
14.9
Stats
Selection radius increased to 140 units from 90.
14.8
Stats
Base health regeneration reduced to 5 from 8.
14.5
Unstable Matter
Base damage changed to 40 to 80 from 35 to 95.
14.4
Stretching Strikes
Tether range reduced to 900 units from 1000.
Tether range type changed to edge from center.
Tether now innately checks every 0.05 seconds for valid range conditions, and no longer waits for every 8th server tick.
14.2
Elastic Slingshot
Bug Fix: No longer has an error in its internal cast range values that sometimes caused it to cast backwards at rank 5 of the ability while Clamp Cast Targeting was enabled.
14.1
Cell Division
Heal increased to 5% to 8% of his maximum health from 4% to 7%.
Elastic Slingshot
Cooldown reduced to 22 to 10 seconds from 24 to 12.
Let's Bounce!
Cooldown reduced to 120 to 90 seconds from 130 to 100.
13.9
Elastic Slingshot
Bug Fix: No longer distorts the character model of an enemy Zac if used while near them.
13.3
Unstable Matter
AP ratio reduced to 3% per 100 AP from 4% per 100 AP.
Elastic Slingshot
Base damage reduced to 60 to 240 from 60 to 260.
AP ratio reduced to 80% AP from 90% AP.
12.23
Cell Division
Heal per chunk increased to 4% to 7% of his maximum health from 4% to 6.25%.
Stretching Strikes
Cooldown reduced to 14 to 8 seconds from 15 to 9.
Health ratio increased to 4% maximum health from 2.5%.
12.22
Stretching Strikes
Undocumented / Bug Fix: The second Stretching Strike no longer fails to trigger against Prophet of an Elder God, Powder Keg, and some other units.
Let's Bounce!
Bug Fix: Last tick of the effect now properly always deals damage.
12.16
Cell Division
Bug Fix: Can no longer revive from the resurrection even after all bloblets have died while having Mountain Dragon Soul.
12.10
Stats
Base health increased to 685 from 615.
Health growth increased to 109 from 95.
Armor growth increased to 4.7 from 3.5.
Magic resistance growth increased to 2.05 from 1.25.
Cell Division
Heal per chunk reduced to 4% to 6.25% of his maximum health from 5% to 8%.
Let's Bounce!
Cell Division bonus heal reduced to 0.75 to 2.25% maximum health from 1 to 3%.
AP ratio increased to 4% per 100 AP from 2% per 100 AP.
10.18
Unstable Matter
Bug Fix: Cooldown is now properly reduced for picking Cell Division chunks.
9.19
Cell Division
Heal increased to 4% to 7% of his maximum health from 4% at all Let's Bounce! ranks.
New Effect: Cooldown is now pingable.
Let's Bounce!
New Effect: Now increases Cell Division chunk heal to 5 to 7% of his maximum health.
9.17
Elastic Slingshot
Bug Fix: Is now properly disabled when grounded.
9.12
Unstable Matter
Base damage increased to 25 to 85 from 15 to 75.
Let's Bounce!
Knockback changed to 250 units away from where target is hit from 400 units away from Zac's center.
New Effect: Each bounce that hits one or more enemy champions spawns a chunk (hitting the same enemy still spawns a chunk), instead of each enemy champion spawns a chunk the first time they're hit by a bounce (subsequent bounces on the same enemy won't spawn additional chunks).
9.11
Stretching Strikes
Slow strength reduced to 40% from 60%.
Cooldown increased to 15 to 9 seconds from 13 to 9.
Unstable Matter
New Effect: Health ratio now scales for 2% per 100 AP.
Let's Bounce! - Rework
New Effect:
Active: After a small delay, Zac bounces 4 times over 3 seconds, gaining 20% to 50%bonus movement speed as he does so but becoming unable to use basic attacks, Stretching Strikes, or Elastic Slingshot for the duration. There is a 1-second delay between each bounce.
Each bounce deals 140(+ 40% AP) magic damage to all nearby enemies,
8.21
Stretching Strikes
Base damage increased to 40 to 100 from 30 to 70.
8.10
Unstable Matter
Removed: Health ratio scaling with 2% per 100 AP.
Elastic Slingshot
AP ratio increased to 90% AP from 70% AP.
Let's Bounce!
AP ratio increased to 90% AP from 70% AP.
8.1
Let's Bounce!
Bug Fix:Zac will no longer get stuck in his Let's Bounce! animation continuously if he revives with Guardian Angel after during the cast animation.
7.22
Stats
New: Now has +15% bonus attack speed at level 1.
Base armor increased to 33 from 24.
7.17
Cell Division
Bug Fix: Bloblets are now correctly invisible when in fog of war.
7.15
Stretching Strikes
Current health cost increased to 8% current health from 4% current health.
Cooldown increased to 13 seconds from 12.
Unstable Matter
Base damage reduced to 15 from 30.
Elastic Slingshot
Bug Fix: Fixed a bug where he could channel Elastic Slingshot while under hard crowd control effects if he used it right before they were applied.
Voice getting higher threshold reduced to 30% health from 60% health.
Elastic Slingshot
Warning indicator before Zac lands increased to 1 seconds from 0.75.
Let's Bounce!
Bug Fix: Enemies no longer turn invisible if Zac tries to drop them in huge areas of unpassable terrain at Let's Bounce!'s max range (no such areas exist on Summoner's Rift).
7.10
Stretching Strikes
Base damage reduced to 30 from 40.
Let's Bounce!
Bug Fix: Fixed a visual bug where if he died while charging Let's Bounce!, his ult kidnap animation would play on top of him for the rest of the game.
Stretching Strikes
Base damage reduced to 40 from 50.
New Effect: Damage now scales with 2.5% of Zac'smaximum health.
Second hit bonus attack range increased to 125 from 100.
New Effect: Second part of the spell now always spawns a second blob if it hits a unique unit.
7.9
Stretching Strikes
Slow duration increased to 0.5 seconds from 0.25.
Elastic Slingshot
Base damage increased to 80 from 80.
General
Zac's voice now changes in pitch and speed based on his current size.
Many of Zac's idle, movement, and emote animations have also been updated.
Stats
Base attack damage increased to 60 from 59.67.
Base armor increased to 24 from 23.88.
Base health increased to 615 from 614.6.
Base health regeneration increased to 8 from 7.92.
knocking them back
for 1 second and subsequently
slowing
them by 20% for the same duration.
Enemies can be damaged by multiple bounces, with each beyond the first dealing 50% damage but not displacing them.
Effect Radius: 300 / 400.
Cooldown:130 to 100 seconds.
Old Effect:
Active - First Cast:Zac squishes himself down while charging for up to 2.5 seconds, during which he is unstoppable, and slowing by 30 to 50% any enemies standing on top of him.
Second Cast:Zacknocks back nearby enemies 275 units over 1 second and deals 150 to 350(+ 90% AP) magic damage. If charged for at least 1 second before recasting, Zac instead scoops up enemies on top of him, carrying them towards the target location. While flying through the air, Zac is immune to crowd control.
Upon landing, nearby and transported enemies take the same magic damage and are slowed by 25% for 0.5 seconds.
Target Range:700 to 1000.
Effect Radius: 300.
Cooldown:130 to 100 seconds.
Recall's audio has been restored.
Collision AoE size increased to 300 from 200.
Bug Fix: If the second hit would kill a minion or monster, the target will now wait to die until after Zac has slammed it into Stretching Strikes' first target.
New Effect: If the first target is standing on top of other enemies, the second hit will now reliably choose a different target than the first.
New Effect: Can now cast Unstable Matter and queue up Elastic Slingshot during Stretching Strikes' second attack and while slamming two targets together.
Elastic Slingshot
New Effect: Knockup duration now scales from 0.5 to 1 second base upon how long Zac charges before release.
Let's Bounce!
Time to full charge time increased to 1.1 seconds from 1.
Health regeneration growth reduced to 0.5 from 0.55.
Cell Division
New Effect: New ability icon.
Stretching Strikes
Renamed Stretching Strikes from Stretching Strike.
New Effect: New ability icon.
Cooldown increased to 12 seconds from 9.
Rework:Zac's arm stretches and grabs the first enemy it hits, dealing 50(+ 30% AP) magic damage and slowing them by 60% for 0.25 seconds. Zac's next basic attack has 100 bonus attack range and is replaced with a long range smack that repeats the initial magic damage and slow effect. If Zac grabs a different enemy with each attack he'll throw them towards each other, dealing 50(+ 30% AP) magic damage in an area if they collide.
Unstable Matter
New Effect: New ability icon.
Elastic Slingshot
New Effect: New ability icon.
Maximum channel duration before automatically cancelling reduced to 0.9 seconds from 0.9.
Base damage reduced to 80 from 80.
Knockup duration reduced to 0.5 seconds from 1.
Let's Bounce!
New Effect: New ability icon.
Rework:
First cast:Zac squishes himself down, making him immune to Crowd Control for up to 2.5 seconds. Any enemies standing on top of him are slowed by 30%.
Second cast: Charging for at least 1 second before recasting causes Zac to scoop up enemies on top of him, carrying them towards the target location. While flying through the air Zac is unstoppable. Upon landing nearby enemies take 150(+ 70% AP) magic damage and are slowed by 25% for 0.5 seconds. Reactivating before Zac charges up knocks back nearby enemies instead.
