This brilliant life-economy loop turns your own deck into a bottomless well by exploiting the clever synergy between Greed and K'rrik, Son of Yawgmoth, which lets you bypass black mana costs by trading life instead. Every time you draw that card, Sheoldred, the Apocalypse steps in to reward you with massive life gain—an amount further doubled thanks to Rhox Faithmender's replacement effect. Because you gain significantly more life from Sheoldred than Greed and K'rrik demand to draw the card, the transaction generates a surplus of life and infinite card draw without ever running dry.