This clever loop hinges on the mana-generating engine of Ashnod's Altar paired with Mite Overseer's ability to pump out token threats, which is heavily amplified by Chatterfang, Squirrel General's replacement effect to double your incoming tokens whenever a creation event occurs. Because Chatterfang generates those extra Squirrels alongside your Phyrexian Mites, you end up with more sacrificial fodder than you spend mana to produce, turning Ashnod's Altar into a net-positive mana generator. Meanwhile, Leyline of Vitality quietly rewards all this frantic spawning by continuously padding your life total with a steady stream of life gain triggers every time a new creature enters the battlefield.