Shifting Woodland + Aftermath Analyst + Lotus Cobra + Lithatog

Shifting Woodland

Aftermath Analyst

Lotus Cobra

Lithatog

How it works

1. Activate Lithatog's second ability by sacrificing any land except Shifting Woodland, giving it +1/+1 until end of turn.
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, Lotus Cobra 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 Lotus Cobra's trigger.

This loop turns the graveyard into a revolving door for your mana base, fueled once you control nine or more lands to net positive mana. You begin by feeding your extra lands to Lithatog to clear the board, leaving Shifting Woodland as your sole remaining land so it can use its delirium ability to copy Aftermath Analyst. Activating that copied ability lets Shifting Woodland sacrifice itself to pull every land back from the graveyard, and because Lotus Cobra triggers off each land entering the battlefield, you generate more than enough mana to recast the copy effect and repeat the process indefinitely.