(Innate): Increases the experience he and all allied champions gain by 8%. This is not in effect while Zilean is dead.
Heightened Learning is a passive global aura that grants Zilean and all allied champions 8% increased experience gain.
When enabling the experience gain display in options, it will only show the raw gain, not the resultant figure after being multiplied by Heightened Learning.
(Active): Zilean places a time-delayed bomb on a target, whether ally or enemy. The bomb will detonate after 4 seconds, dealing magic damage to all surrounding enemies. The bomb will detonate immediately if the holder dies or if another bomb is placed on them.
If a Time Bomb is placed on a unit that is in stealth, the bomb will not be visible to the enemy team.
Since V188.8.131.52, the true damages that indicate the ticking of the bomb has been removed, the red numbers, 4, 3, 2, 1, that pop up each second is purely indicative about the detonation time. That means the countdown will no longer attract aggro from minion when placed on the enemy champion, but it will still draw turret aggro. If an enemy champion with the Time Bomb debuff dies before the bomb detonates, Zilean will not be granted kill assist credit.
Previously, placing a Time Bomb on an ally who already has an enemy Zilean's bomb on them would negate the first bomb, or vice versa. Now, the first bomb will detonate instantly no matter whether the bomb belongs to ally or enemy.
If a target with Time Bomb debuff takes lethal, not revivable damage before the bomb is over, the bomb detonates instantly. If the target takes lethal damage and enters a reviving process through Chrono Shift or Guardian Angel, the bomb will be negated like most debuffs.
(Active): Upon activation, all of Zilean's other abilities' cooldowns are refreshed by 10 seconds. Rewind does not affect itself or summoner spells.
Cost: 50 mana
Cooldown: 18 / 15 / 12 / 9 / 6 seconds
Rewind is a self-target ability that refreshes all of Zilean's champion ability cooldowns by 10 seconds, except for Rewind itself.
(Active): Marks a target ally champion or himself with a protective time rune for 7 seconds. If the target takes lethal damage during this time, instead of dying, they become untargetable and remain in stasis for 2 seconds, then return to life, regaining health.
Cooldown: 180 seconds
Range: 780 (estimated)
Cost: 125 / 150 / 175 mana
Health Gained: 600 / 850 / 1100 (+2.0 per ability power)
Chrono Shift is a targeted ability that buffs a target allied champion. If the target dies within 7 seconds after cast, the target will not die but instead become untargettable for 2 seconds, after which the champion regains health.
Revival from Chrono Shift will remove the invulnerability granted to the recipient when a nexus is being destroyed, which means bot champions can still damage the recipient and even kill them after victory or defeat is announced.