Ashaya, Soul of the Wild + Stone-Seeder Hierophant + Simic Growth Chamber + PuPu UFO

Ashaya, Soul of the Wild

Stone-Seeder Hierophant

Simic Growth Chamber

PuPu UFO

How it works

1. Activate PuPu UFO by tapping it, putting Simic Growth Chamber from your hand onto the battlefield.
2. When Simic Growth Chamber enters, it and Stone-Seeder Hierophant trigger.
3. Resolve the Simic Growth Chamber trigger, returning it from the battlefield to your hand.
4. Resolve the Stone-Seeder Hierophant trigger, untapping it.
5. Activate Stone-Seeder Hierophant by tapping it, untapping PuPu UFO as it is a land due to Ashaya.
6. Repeat.

This crafty loop centers on Ashaya, Soul of the Wild, whose passive ability turns every nontoken creature you control—including Stone-Seeder Hierophant and PuPu UFO—into a Forest land in addition to its other types. Because Stone-Seeder Hierophant is now a land, its landfall ability untaps itself whenever a land enters, while its tap ability can untap PuPu UFO since PuPu UFO is also a land. This creates a perpetual cycle where PuPu UFO repeatedly drops Simic Growth Chamber onto the battlefield from your hand, bouncing itself back to hand each time while triggering Stone-Seeder Hierophant to reset the entire machinery.