User blog comment:Kenetron/Zilean, the Chronokeeper Rework (my version)/@comment-24862418-20140728234925

That ultimate ... Like reviving one ally isn't OP already. How much health the ally has when revived?

Zilean is known for his powerful spell with high cooldown, in return for his W - almost refresh the other 2 basic ability cooldown. You replace his W with a very high cooldown ability. Playing him will be boring now as all his cooldown is >=10s. And you also killed Zilean support. His combo QWQ for high damage and EWE for gank survival.

Now, talking about W. My 1st impression: "Holly crab, freaking OP ability". But then, what the point to have 20% Ar/Mr and heal at THE END of the duration for a 50-70s cooldown. It is a very risky ability.

His passive is the thing I hate the most in his kit. It doesn't impact the game much (consider old global passive: TF gains the similarity, gives ally items faster than enemy, but way more useful than this passive; Janna gives small haste, gives ally an advantage to chase/run away enemy). I think the passive should be replaced by something else.