Sun Titan + Fiend Hunter + Blasting Station

Sun Titan

Fiend Hunter

Blasting Station

How it works

1. Activate Blasting Station by tapping it and sacrificing Fiend Hunter.
2. When Fiend Hunter dies, its second ability triggers, returning Sun Titan to the battlefield from exile.
3. When Sun Titan enters the battlefield, it and Blasting Station trigger.
4. Resolve the Blasting Station trigger, untapping it.
5. Resolve the Sun Titan trigger, returning Fiend Hunter from your graveyard to the battlefield.
6. When Fiend Hunter enters the battlefield, its first ability and Blasting Station trigger.
7. Resolve the Blasting Station trigger, untapping it.
8. Resolve the Fiend Hunter trigger, exiling Sun Titan.
9. Resolve the Blasting Station ability from step 1, dealing 1 damage to any target.
10. Repeat.

This loop relies on a brilliant cyclical partnership between Sun Titan and Fiend Hunter to repeatedly trigger entry and exit effects. By feeding Fiend Hunter to Blasting Station, you send the Hunter to the graveyard while dealing damage and untapping the Station thanks to its own trigger. Sun Titan then steps in to pull Fiend Hunter right back out of the graveyard upon entering the battlefield, which in turn exiles the Titan all over again when the Hunter re-enters, restarting the cycle.