Zilean grants a protective time rune to an allied champion for 5 seconds. If the target would die, the rune rewinds their timeline, putting them into Stasis for 3 seconds, then reviving them and restoring 600 / 850 / 1100 (+200% of ability power) health.
makes Zilean a portable guardian angel, which can be used on any teammate. Remember that the ability which reduces cooldowns also reduces the cooldown on this spell.
no more. Now it only reduces Q and E, and Ult CD is 60 at max rank, with 40 percent CDR is roughly 36. Quite low still, considering that it's ult