This loop leverages Dino DNA's ability to recreate creatures from your graveyard, turning it into a red mana engine once a Priest of Urabrask has found its way there. Because Exalted Sunborn doubles any tokens created under your control, every activation yields two Priest of Urabrask copies instead of one. The combined entry triggers of these tokens generate six red mana—more than enough to pay the six-mana activation cost required by Dino DNA to keep the loop going.