Blasting Station + Sister Hospitaller + Fiend Hunter

Blasting Station

Sister Hospitaller

Fiend Hunter

How it works

1. Cast Fiend Hunter by paying its mana cost.
2. When Fiend Hunter enters, its first ability and Blasting Station trigger.
3. Resolve the Fiend Hunter trigger, exiling Sister Hospitaller.
4. Resolve the Blasting Station trigger, untapping it.
5. Activate Blasting Station by tapping it and sacrificing Fiend Hunter.
6. When Fiend Hunter dies, its second ability triggers, returning Sister Hospitaller from exile to the battlefield.
7. When Sister Hospitaller enters, it and Blasting Station trigger.
8. Resolve the Blasting Station trigger, untapping it.
9. Resolve the Sister Hospitaller trigger, returning Fiend Hunter from your graveyard to the battlefield.
10. Repeat steps 2 through 4 one additional time.
11. Resolve the Blasting Station ability from step 5.
12. Repeat from step 5.