Shifting Woodland + Aftermath Analyst + Amulet of Vigor + Sylvan Safekeeper

Shifting Woodland

Aftermath Analyst

Amulet of Vigor

Sylvan Safekeeper

How it works

1. Activate Sylvan Safekeeper 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, Amulet of Vigor triggers that many times, untapping the lands.
6. Activate any number of lands by tapping them, adding at least 5.
7. Repeat.
8. Resolve all Sylvan Safekeeper abilities.