Spawning Pit + Fiend Hunter + Hero of the Dunes

Spawning Pit

Fiend Hunter

Hero of the Dunes

How it works

1. Cast Fiend Hunter by paying its mana cost.
2. When Fiend Hunter enters, its first ability triggers, exiling Hero of the Dunes.
3. Activate Spawning Pit by sacrificing Fiend Hunter.
4. When Fiend Hunter dies, its second ability triggers, returning Hero of the Dunes from exile to the battlefield.
5. When Hero of the Dunes enters, it triggers, returning Fiend Hunter from your graveyard to the battlefield.
6. When Fiend Hunter enters, its first ability triggers, exiling Hero of the Dunes.
7. Resolve the Spawning Pit ability.
8. Repeat from step 3.