Rootpath Purifier + Wheel of Sun and Moon + Terramorphic Expanse + Stone-Seeder Hierophant

Rootpath Purifier

Wheel of Sun and Moon

Terramorphic Expanse

Stone-Seeder Hierophant

How it works

1. Activate Terramorphic Expanse by tapping and sacrificing it.
2. Terramorphic Expanse is put on the bottom of your library instead of in your graveyard due to Wheel of Sun and Moon.
3. Resolve the Terramorphic Expanse ability, searching your library for Terramorphic Expanse and putting it onto the battlefield tapped.
4. Terramorphic Expanse enters the battlefield, triggering Stone-Seeder Hierophant, untapping Stone-Seeder Hierophant.
5. Activate Stone-Seeder Hierophant by tapping it, untapping Terramorphic Expanse.
6. Repeat.