MTG >Combos >Ugin's Nexus +Throne of Geth +Doubling Season +Karn, the Great Creator +

Sacrifice Ugin's Nexus with Throne of Geth to proliferate Put a loyalty counter on Karn Doubling Season's ability will cause two counters to be placed. Exile Ugin's Nexus to take an extra turn Activate Karn's -2 ability to fetch Ugin's Nexus from exile Repeat the process.