Shriekmaw [Ultimate Masters] RB1-009 Polymorphine — You may have

Polymorphine — You may have Callidus Assassin enter the battlefield tapped as a copy of any creature on the battlefield

Set: Commander Masters Type: Legendary Creature — Goblin Ally Rarity: Uncommon Cost: {3}{R} Whenever you cast an instant or sorcery spell that targets only Zada

savage and pure

Roar of the World is in the command zone or on the battlefield

Whenever one or more nontoken creatures enter the battlefield

Shriekmaw [Ultimate Masters] RB1-009 Polymorphine — You may haveSet: Ultimate Masters Type: Creature Elemental Rarity: Uncommon Cost: {4}{B} Fear (This creature can't be blocked except by artifact creatures and or black creatures.) When Shriekmaw enters the battlefield, destroy target nonartifact, nonblack creature. Evoke {1}{B} (You may cast this spell for its evoke cost. If you do, it's sacrificed when it enters the battlefield.)