Kasandra, Queen of Hearts

+1: Kasandra deals 1 damage to target creature and its controller. You gain 1 life.
-3: Creatures you control gain Undying and "When this creature dies, it deals 2 damage to target creature" until the end of turn.
-7: Gain control of all nonland permanents. You get an emblem with "Creatures you control have Lifelink and Deathtouch."