This clever loop transforms Ashnod's Altar into an engine of continuous creation by exploiting Boomer Scrapper's trigger whenever a token leaves the battlefield. As Boomer Scrapper receives a +1/+1 counter from that departure, Animation Module steps in with its triggered ability to let you pay {1} for a fresh Servo token, conveniently funded by the two colorless mana generated when you sacrifice that very token to Ashnod's Altar. Because the sacrifice satisfies the Altar while leaving enough mana over to pay Animation Module's fee, the entire assembly becomes self-sustaining.