The Maelstrom (Planechase)

When you planeswalk to The Maelstrom or at the beginning of your upkeep, you may reveal the top card of your library. If it's a permanent card, you may put it onto the battlefield. If you revealed a card but didn't put it onto the battlefield, put it on the bottom of your library. Whenever you roll Chaos, return target permanent card from your graveyard to the battlefield.