Whenever Bonnie, Chaos Creature enters the battlefield, each player searches their library, graveyard, exile, hand or command zone for a legendary creature or planeswalker, then put those creatures onto the battlefield under their owners control and shuffle all libraries. Choose one creature or planeswalker put onto the battlefield this way. You gain control of that card.

{6}{U}: Exile Bonnie, Chaos Creature then return her to the battlefield under her owners control.