Iphereion, Advisor of Fates

Flying, Hexproof
Reconstitute {w/u}{1}- Whenever a non-token creature enters the battlefield under your control you may pay {w/u}{1}. If you do, put it on the bottom of your library then reveal cards from the top of your library until you reveal a permanent card with converted mana cost equal to or less than that card, put it on to the battlefield. Put all other cards revealed this way on the bottom of your library in any order.