This clever loop relies on a clever recursion tag-team between the skeletal royalty and our sacrificial outlets. You begin by feeding Ozox, the Clattering King to Ashnod's Altar to generate the colorless mana needed to recast it later while triggering its death effect. That death replaces Ozox with Jumblebones, a token you promptly feed into Phyrexian Altar to generate the colored mana required to complete the casting cost. Crucially, as Jumblebones leaves the battlefield, its triggered ability plucks Ozox right back out of your graveyard and into your hand, setting the stage to loop the entire sequence anew.