Rakdos, Eternal Overture

Flying, Trample, Haste
Rakdos, Eternal Overture must attack an opponent other than its owner each combat. Sacrifice it at the end of combat.
At the beginning of each opponents upkeep, if Rakdos, Eternal Overture is in your graveyard, that player may return it to the battlefield under their control. If they do not, exile it, then return each creature card in your graveyard to the battlefield.