This clever loop turns graveyard recursion into a self-sustaining mana and token engine, legal in formats like Commander and Legacy. At the heart of the machinery is Reassembling Skeleton, which continuously cycles between the battlefield and the grave using mana generated by sacrificing it to Phyrexian Altar. The true catalyst for this loop is On Wings of Gold, whose static ability ensures that every time the Skeleton leaves your graveyard, you are rewarded with a 1/1 white Zombie creature token. Those generated tokens can then be sacrificed right back into Phyrexian Altar to offset the activation costs, yielding an endless supply of death triggers, sacrifices, and mana.