Emeria Shepherd + Aftermath Analyst + Zuran Orb + Archelos, Lagoon Mystic

Emeria Shepherd

Aftermath Analyst

Zuran Orb

Archelos, Lagoon Mystic

How it works

1. Activate any number of lands by tapping them, adding at least 3.
2. Activate Zuran Orb by sacrificing a land.
3. Repeat step 2 until you control no lands.
4. Activate Aftermath Analyst by paying 3 and sacrificing it, returning all lands from your graveyard to the battlefield untapped due to Archelos.
5. When the lands enter, Emeria Shepherd triggers that many times.
6. Resolve an Emeria Shepherd trigger that was triggered by a Plains, returning Aftermath Analyst from your graveyard to the battlefield.
7. Resolve all other Emeria Shepherd triggers, returning any number of nonland permanents from your graveyard to either your hand or the battlefield.
8. Repeat.

This looping engine relies on cycling your lands in and out of the graveyard to continually trigger Emeria Shepherd's landfall ability. Zuran Orb acts as the sacrifice outlet to clear your lands into the graveyard while gaining life, fueling Aftermath Analyst so you can sacrifice it to flood the battlefield with those lands all at once. Because Archelos, Lagoon Mystic is tapped, your returning lands enter the battlefield tapped as well, which neatly satisfies the landfall requirement for Emeria Shepherd. Finally, you use one of those Shepherd triggers—originating from a returned Plains—to recur Aftermath Analyst right back to the field, leaving the rest of the triggers free to pull every single nonland permanent from your graveyard straight into play.