Ashaya, Soul of the Wild + Stone-Seeder Hierophant + Llanowar Scout + Boros Garrison

Ashaya, Soul of the Wild

Stone-Seeder Hierophant

Llanowar Scout

Boros Garrison

How it works

1. Activate Llanowar Scout by tapping it, putting Boros Garrison from your hand onto the battlefield.
2. When Boros Garrison enters, it and Stone-Seeder Hierophant trigger.
3. Resolve the Boros Garrison 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.