This fascinating loop hinges on the clever layering of graveyard recursion and sacrifice to clear the entire board. By casting Moment of Reckoning and responding with Naru Meha, Master Wizard, you set up a dynamic where Naru Meha's entry trigger copies the original spell, but the original spell itself can be chosen as a modal target to recur things from your graveyard—or simply destroy problematic nonland permanents along the way. Because Umbral Collar Zealot allows you to sacrifice Naru Meha to fuel its surveil ability right in the middle of the stack, Naru Meha conveniently puts itself right back into the graveyard just in time for the resolving spell copy to bring it straight back to the battlefield. This self-sustaining cycle lets you continuously repeat the process for an overwhelming cascade of triggers and total removal.