Ashaya, Soul of the Wild + Stone-Seeder Hierophant + Guildless Commons + PuPu UFO

Ashaya, Soul of the Wild

Stone-Seeder Hierophant

Guildless Commons

PuPu UFO

How it works

1. Activate PuPu UFO by tapping it, putting Guildless Commons from your hand onto the battlefield.
2. When Guildless Commons enters, it and Stone-Seeder Hierophant trigger.
3. Resolve the Guildless Commons 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 lets you generate infinite landfall triggers by turning your creatures into lands and bouncing a single piece of real estate over and over. With Ashaya, Soul of the Wild on the battlefield, Stone-Seeder Hierophant and PuPu UFO both become Forests in addition to their other types, meaning they count as lands for every effect. When you tap PuPu UFO to drop Guildless Commons from your hand, the Commons's own entry trigger forces you to return it right back to your hand, but Stone-Seeder Hierophant's landfall ability triggers simultaneously. By resolving that landfall trigger to untap Stone-Seeder Hierophant itself, you can then tap the Hierophant to untap PuPu UFO—which is now a land thanks to Ashaya—resetting the whole cycle to play Guildless Commons once more.