Shifting Woodland + Aftermath Analyst + Tireless Provisioner + Sylvan Safekeeper

Shifting Woodland

Aftermath Analyst

Tireless Provisioner

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, Tireless Provisioner triggers that many times, creating a Treasure token for each land that entered the battlefield this way.
6. Activate eight Treasures by tapping and sacrificing them, adding 5.
7. Repeat.
8. Resolve all Sylvan Safekeeper abilities.