Astral Dragon, Springheart Nantuko, and Stone-Seeder Hierophant

Prerequisites

• Astral Dragon on the battlefield
• Springheart Nantuko on the battlefield
• Stone-Seeder Hierophant on the battlefield
• if the land card in hand does not enter untapped and/or cannot produce mana available

Steps

1. Play a land
2. When the land enters, Springheart Nantuko and Stone-Seeder Hierophant trigger
3. Holding priority, if the land enters the battlefield untapped, activate it by tapping it, adding at least
4. Resolve the Stone-Seeder Hierophant trigger, untapping it
5. Holding priority, activate Stone-Seeder Hierophant by tapping it, untapping a land
6. Activate the land by tapping it, adding at least
7. Resolve the Springheart Nantuko trigger, causing you to pay to create a token copy of Astral Dragon
8. When the Astral Dragon token enters the battlefield, it triggers, creating two copies of a land you control that are 3/3 Dragon creatures in addition to their other types
9. When the land tokens enter the battlefield, Springheart Nantuko and Stone-Seeder Hierophant trigger twice
10. Repeat steps 3 through 5 two additional times for the Stone-Seeder Hierophant triggers from step 8
11. Resolve the first Springheart Nantuko trigger, choosing not to pay and creating a 1/1 Insect creature token
12. Repeat from step 6 with the second Springheart Nantuko trigger

Results

• Infinite ETB
• Infinite creature tokens
• Infinite landfall triggers