Ashaya, Soul of the Wild + Stone-Seeder Hierophant + Llanowar Scout + Rakdos Carnarium

Ashaya, Soul of the Wild

Stone-Seeder Hierophant

Llanowar Scout

Rakdos Carnarium

How it works

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