Ashaya, Soul of the Wild + Stone-Seeder Hierophant + Llanowar Scout + Izzet Boilerworks

Ashaya, Soul of the Wild

Stone-Seeder Hierophant

Llanowar Scout

Izzet Boilerworks

How it works

1. Activate Llanowar Scout 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 Llanowar Scout as it is a land due to Ashaya.
6. Repeat.