Shadow of Yharnam

First strike, haste, bushido 1

Creatures in your hand and creatures you control have metamorphose. Their metamorphose cost is equal to their casting cost minus {b},{r} or {g}. (Double this creatures power and toughness. It becomes a snake in addition to its other types. Sacrifice it at the begging of the next end step. You
may cast a creature for its metamorphose cost. If you do, double its power and toughness then sacrifice it at the begging of the next end step.)