Bocrivel's defeat

If Bocrivel's Defeat would be put into your graveyard exile all graveyards, hands, and permenants.
Players life turns to zero.
Until the end of the game no damage can be dealt to players. Instead damage is dealt as mill x where x is equal to the amount of damage that is dealt.
Players may not draw cards, during each players
upkeep each player may return target card exiled with Bocrivel's Defeat to their hands.