Ashaya, Soul of the Wild, Stone-Seeder Hierophant, Azorius Chancery, and PuPu UFO

Prerequisites

• Ashaya, Soul of the Wild on the battlefield
• Stone-Seeder Hierophant on the battlefield
• Azorius Chancery in hand
• PuPu UFO on the battlefield

Steps

1. Activate PuPu UFO by tapping it, putting Azorius Chancery from your hand onto the battlefield
2. When Azorius Chancery enters, it and Stone-Seeder Hierophant trigger
3. Resolve the Azorius Chancery 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

Results

• Infinite landfall triggers