The Doomsday Machine

Shroud
Exile 4 puzzleknot artifacts you control with different names. You may place The Doomsday
Machine onto the battlefield from outside the
game.
At the beginning each player's upkeep, that player:
•Exiles 2 nontoken permanents or loses the game.
•May exile 2 additional nontoken permanents to
deal 4 damage to target player and 2 damage to
all other players.