This devastating loop exploits a classic closed-circuit feedback loop between life gain and life loss. Once you initiate the sequence, Marauding Blight-Priest punishes your foes by draining their life totals whenever you gain life. That very loss of life immediately fires off Bloodthirsty Conqueror's triggered ability—which is neatly sustained by its own rules text ensuring that damage causes loss of life—handing you back the life needed to restart the cycle. Because Bloodthirsty Conqueror's trigger checks every opponent that lost life, the loop feeds on itself to drain the entire table down to zero.