Emeria Shepherd + World Shaper + Zuran Orb + Yahenni, Undying Partisan

Emeria Shepherd

World Shaper

Zuran Orb

Yahenni, Undying Partisan

How it works

1. Activate Zuran Orb 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 loop relies on a brilliant cycle of sacrifice, reanimation, and landfall to completely sweep your graveyard clean. You start by using Zuran Orb to bin your lands, which simultaneously feeds Yahenni, Undying Partisan's sacrifice outlet and puts all those lands right where you want them. When you finally sacrifice World Shaper to Yahenni, its death trigger sweeps every single one of those lands straight back onto the battlefield tapped. That mass influx of land entries triggers Emeria Shepherd over and over, allowing you to not only pluck World Shaper right back out of the yard, but also pull every other nonland permanent from your graveyard straight onto the battlefield alongside it.