User blog comment:GimmeStarfoxWii/If you could have the powers/abilities of any League champion.../@comment-6271162-20130627201423/@comment-3974211-20130628211034

Also, Zilean doesn't have any control over time. He is a sorcerer and a seer - i.e. he is a powerful mage who can speed people up an shield people from harm, but the extent of his "time powers" is only visions of the future. And those visions came at a cost - he suffers from a disease that causes his mind to constantly shift backwards and forward in time against his will his own, essentially plaguing him with visions of the people who couldn't save.