Karn, the Great Creator + Ugin's Nexus + Throne of Geth + Ichormoon Gauntlet

Prerequisites

• You control at least one additional planeswalker.

Steps

1. 1Activate any other planeswalker by putting zero loyalty counters on it, putting a loyalty counter on Karn.
2. 2Activate Throne of Geth by tapping it and sacrificing Ugin's Nexus.
3. 3Ugin's Nexus is exiled instead of being put into your graveyard, causing you to take an extra turn after this one.
4. 4Resolve the Throne of Geth ability, putting a loyalty counter on Karn.
5. 5Activate Karn's second loyalty ability by removing two loyalty counters from it, returning Ugin's Nexus from exile to your hand.
6. 6Move to your next turn.
7. 7Cast Ugin's Nexus by paying .
8. 8Repeat.

Effects

• Infinite turns
• Lock