Ashaya, Soul of the Wild + Stone-Seeder Hierophant + Karoo + Whitemane Lion

Ashaya, Soul of the Wild

Stone-Seeder Hierophant

Karoo

Whitemane Lion

How it works

1. Activate Karoo by tapping it, adding C
2. Cast Whitemane Lion by paying its mana cost.
3. When Whitemane Lion enters as a land due to Ashaya, it and Stone-Seeder Hierophant trigger.
4. Resolve the Whitemane Lion trigger, returning it from your graveyard to the battlefield.
5. Resolve the Stone-Seeder Hierophant trigger, untapping it.
6. Activate Stone-Seeder Hierophant by tapping it, untapping Karoo.
7. Repeat.