User blog comment:GimmeStarfoxWii/If you could have the powers/abilities of any League champion.../@comment-4814368-20130625204947/@comment-3974211-20130628121646

You wouldn't be able to bring people back who are already dead, though. He isn't a time traveler, he's a seer with limited control of the present. His abilities also plague him - he constantly has visions of his past and the ones he failed to save.

Zilean's lore is much sadder than people give his ability set credit for.