Shifting Woodland + Aftermath Analyst + Nissa, Resurgent Animist + Trenching Steed

Shifting Woodland

Aftermath Analyst

Nissa, Resurgent Animist

Trenching Steed

How it works

1. Activate Trenching Steed by sacrificing any land except Shifting Woodland.
2. Repeat step 1 until you control no other lands except Shifting Woodland.
3. Activate Shifting Woodland's second ability by paying 2, causing it to become a copy of Aftermath Analyst until end of turn.
4. Activate Shifting Woodland by paying 3 and sacrificing it, returning it and all other land cards from your graveyard to the battlefield tapped.
5. When the lands enter the battlefield, Nissa triggers that many times, adding for each land that entered the battlefield this way.
6. Repeat.
7. If you control nine or more lands, this combo will net infinite mana due to Nissa's trigger.

By feeding lands into Trenching Steed's sacrifice ability, you clear the way for Shifting Woodland to transform into a copy of Aftermath Analyst via its delirium ability. Once transformed, Shifting Woodland can sacrifice itself along with the rest of your graveyard's land cache to bring everything back at once. This mass return triggers Nissa, Resurgent Animist multiple times over, generating a surplus of colored mana to fund the entire loop infinitely.