Stupid Deaths

Each player exiles all creature cards from their graveyards. Flip a coin for each creature on the battlefield, then for each creature whose coin
came up tails, it's controller sacrifices it. Flip a
coin for each creature exiled this way, then put all creature cards whose coin came up heads onto the battlefield under it's owner's control. Then
put all cards in exile that weren't put onto the battlefield in their owner's graveyards.
Hope next time it's not you!