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

Toph, the First Metalbender

Ugin's Nexus

Meticulous Excavation

Trenching Steed

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 Trenching Steed 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 Trenching Steed ability.
6. Activate Meticulous Excavation by paying 2, returning Ugin's Nexus from the battlefield to your hand.
7. Repeat each turn.

This ingenious loop achieves infinite turns by repeatedly sending Ugin's Nexus to the graveyard—or in this case, sacrificing it as a land to Trenching Steed—to trigger its replacement effect for an extra turn. Toph, the First Metalbender makes this possible by turning the Nexus into an artifact land, and her earthbend trigger brilliantly brings it right back from exile so you can recast it or pick it up. Meanwhile, Meticulous Excavation provides an alternative way to bounce the Nexus to your hand if needed, ensuring your engine keeps running smoothly.