This intricate loop turns the cycle of life and death into a self-sustaining engine, anchored by Kenrith, the Returned King's ability to pull fallen allies straight from the graveyard. Ashnod's Altar provides the sacrificial outlet to generate the raw colorless mana needed to fuel the process, while Heartstone lightens the activation load to make the loop profitable. Because Orzhov Enforcer leaves behind a Spirit token via Afterlife when it perishes, you have a ready-made secondary sacrifice to keep the momentum going. Finally, Prismite acts as a clever color fixer, converting your colorless altar-mana into the black mana required to keep Kenrith's resurrection cycle spinning indefinitely.