By copying the activated abilities of both creatures while dodging name-sharing restrictions, Marvin, Murderous Mimic acts as the ultimate synthesis of our mana-producing machinery. Pili-Pala provides the crucial untap engine—costing two mana to untap itself and generate a return—while Ilysian Caryatid acts as the high-yield tap-ability that supplies that required mana and more once a powerful creature is on the board. By cycling between these two stolen traits, Marvin endlessly nets extra mana of any color.