Toph, the First Metalbender + Ugin's Nexus + Meticulous Excavation + Atog

Toph, the First Metalbender

Ugin's Nexus

Meticulous Excavation

Atog

How it works

1. Cast Ugin's Nexus by paying 5.
2. At the beginning of your end step, Toph triggers, causing Ugin's Nexus to become an artifact land creature.
3. Activate Atog by sacrificing Ugin's Nexus. Ugin's Nexus is exiled instead of being put into your graveyard, causing you to take an extra turn after this one.
4. Toph triggers, returning Ugin's Nexus from exile to the battlefield.
5. Resolve the Atog ability.
6. Activate Meticulous Excavation by paying 2, returning Ugin's Nexus from the battlefield to your hand.
7. Repeat each turn.

This intricate loop turns Ugin's Nexus into a renewable engine for endless extra turns by weaponizing its replacement effect. Thanks to Toph, the First Metalbender, your noncreature artifacts double as lands, making Ugin's Nexus uniquely vulnerable to Toph's end step earthbend ability—which continuously rescues it from exile and returns it to the battlefield whenever it dies or is exiled. You leverage Atog to sacrifice Ugin's Nexus to the graveyard, triggering its exile-and-extra-turn clause, while Meticulous Excavation offers an alternative way to reset the Nexus to your hand when needed. By repeatedly looping these interactions, you completely lock opponents out of the game by taking every single turn.