MTG >Combos >Ashnod's Altar +Enduring Renewal +Universal Automaton +Rin and Seri, Inseparable +

With all cards in play, cast Universal Automaton Rin and Seri's ability will trigger, identifying Universal Automaton as a Dog and a Cat, putting 2 1/1 tokens into play. Sacrifice Universal Automaton to Ashnod's Altar, adding two mana. Enduring Renewal's ability will trigger, returning Universal Automaton to your hand. Repeat the process for infinite mana and infinite tokens.