Ashaya, Soul of the Wild + Stone-Seeder Hierophant + Izzet Boilerworks + PuPu UFO

Ashaya, Soul of the Wild

Stone-Seeder Hierophant

Izzet Boilerworks

PuPu UFO

How it works

1. Activate PuPu UFO by tapping it, putting Izzet Boilerworks from your hand onto the battlefield.
2. When Izzet Boilerworks enters, it and Stone-Seeder Hierophant trigger.
3. Resolve the Izzet Boilerworks 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 clever loop hinges on Ashaya, Soul of the Wild turning every nontoken creature you control into a Forest land, which cleverly reclassifies Stone-Seeder Hierophant as a land capable of being targeted by its own activated ability. By using PuPu UFO to drop Izzet Boilerworks onto the battlefield, the resulting landfall trigger untaps your Hierophant, while Boilerworks' bounce trigger immediately returns itself to your hand to fuel the next cycle. Because Ashaya makes the Hierophant a land, it can be constantly readied to untap the UFO, letting you effortlessly repeat this sequence to generate infinite landfall triggers.