MTG >Combos >Prototype Portal +Ugin's Nexus +Phyrexia's Core +

Cast Prototype Portal imprinting Ugin's Nexus Pay five mana and activate the Prototype Portal's ability to create a copy of Ugin's Nexus Sacrifice Ugin's Nexus with Phyrexia's Core Ugin's Nexus' ability will trigger, the copy will be exiled, and you will take an extra turn Repeat the process for infinite turns