Dwarf-Homunculus in a Jar

Dwarf-Homunculus enters the battlefield under
an opponent's control.While you control Dwarf-
Homunculus you cannot lose the game.
At the beginning of each of your end steps, pick
one you haven't picked yet;
• Sacrifice all Non-Land Permanents you control
• Exile all but the top 15 cards of your Library
• Exile your hand