Marvin, Murderous Mimic serves as the brilliant focal point of this engine by borrowing the activated abilities of your other creatures without sharing their names. With Orochi Merge-Keeper on the board providing its tapped mana production—or doubled if modified—you have a reliable way to jump-start your color generation. The real magic happens once Pili-Pala enters the mix, granting Marvin its untap ability that feeds right back into the mana needed to activate it. By repeatedly tapping for mana and paying to untap, you loop the sequence to generate infinite colored mana in formats like commander, legacy, modern, oathbreaker, and vintage.