Ashaya, Soul of the Wild + Stone-Seeder Hierophant + Llanowar Scout + Guildless Commons

Ashaya, Soul of the Wild

Stone-Seeder Hierophant

Llanowar Scout

Guildless Commons

How it works

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