Emeria Shepherd + World Shaper + Yahenni, Undying Partisan + Coastal Hornclaw

Emeria Shepherd

World Shaper

Yahenni, Undying Partisan

Coastal Hornclaw

How it works

1. Activate Coastal Hornclaw by sacrificing a land.
2. Repeat step 1 until you control no lands.
3. Activate Yahenni by sacrificing World Shaper.
4. When World Shaper dies, it triggers, return all lands from your graveyard to the battlefield tapped.
5. When the lands enter, Emeria Shepherd triggers that many times.
6. Resolve an Emeria Shepherd trigger that was triggered by a Plains, returning World Shaper from your graveyard to the battlefield.
7. Resolve all remaining Emeria Shepherd triggers.
8. Resolve the Yahenni ability.
9. Repeat

This self-sustaining loop relies on a clever cycle of resource conversion, centered around the sacrifice outlet provided by Yahenni, Undying Partisan. By repeatedly using Coastal Hornclaw to sacrifice your lands, you clear the board of your own real estate to trigger World Shaper's eventual demise. Once World Shaper is sacrificed to Yahenni, its death trigger sweeps your graveyard clean, returning every land card straight to the battlefield tapped. This massive influx of lands sparks a flurry of Emeria Shepherd landfall triggers; because these returning lands include Plains, the Shepherd can bypass the hand and place World Shaper directly back onto the battlefield, ready to be sacrificed all over again.