Not Updated For Current Season
The masteries shown here are not yet updated for the current season, the guide author needs to set up the new masteries. As such, they will be different than the masteries you see in-game.
Threats to Zilean with this build
this is my guide for Zilean, focussing on support movement speed Zilean, not on AP. Make sure that you will hit your 45% CDR in-game. There are problems at the moments because of the change of ward-purchasing.
I try to keep updating.
Pros / Cons
+ Incredible fast
+ Can revive
+ Insane slow
+ High base-damage on his bombs
+ Strong late
- Weak early
- Less HP, you need items to be effectively
Until you don't have tear, play passive, try to land some bombs at the enemy sometimes. Once you got your core, you can be way more aggresive, because you are very fast and you can escape easily.