Rika Kawaii

+1: You may sacrifice a creature, if you do Rika Kawaii deals X damage where X is the sacrificed creatures power to any target
0: Until end of turn, Rikka Kawaii Becomes a X/X legendary human warrior creature with double strike where X is her amount of loyalty counters
-7: you get an emblem with "creatures you control are indestructible as long as there is a creature in your graveyard"