Asio, the wild's heart

+2: Asio, the wild's heart deals damage to target player or planeswalker equal to the highest toughness of a wolf you control.
-2: All creatures you control get lifelink and deathtouch until end of next turn.
-10: You gain life equal to the number of wolves you control, all opponents lose life equal to the number of wolves you, and it becomes night.