This clever loop transforms graveyard fodder into an unstoppable engine by leveraging cost reduction and sacrifice. With Zirda, the Dawnwaker reducing Dino DNA's activation cost down to just four mana, you can repeatedly pay to create a 6/6 token copy of Priest of Gix. Every time that token enters the battlefield, its ability generates black mana to help fund the next copy, while Ashnod's Altar stands ready to sacrifice the token for colorless mana whenever you need to filter your pool or clear the board. Because Zirda's discount applies to the artifact's ability and the Altar provides an immediate sacrifice outlet, you can cycle through these steps endlessly to generate infinite mana, death triggers, and an army of cloned creatures.