This intricate loop turns Isilu, Carrier of Twilight's passive grant of persist into a private engine of relentless resurrection, allowing Ulasht, the Hate Seed to repeatedly enter the battlefield and hit the graveyard. By feeding Ulasht to Yahenni, Undying Partisan's sacrifice ability, you trigger Ulasht's persist to bring it right back while growing Yahenni larger with indestructible protection. Meanwhile, Eirdu, Carrier of Dawn sets the stage by giving your creature spells convoke before you ever flip to its dark side, ensuring your board stays deeply connected to the mana economy while this trio loops endlessly.