Blasting Station + Thran Vigil + Safehold Elite

Blasting Station

Thran Vigil

Safehold Elite

How it works

1. Activate Blasting Station by tapping it and sacrificing Safehold Elite.
2. When Safehold Elite dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
3. Thran Vigil and Blasting Station trigger.
4. Resolve the Thran Vigil trigger, putting a +1/+1 counter on Safehold Elite.
5. Resolve the Blasting Station trigger, untapping it.
6. Resolve the Blasting Station ability from step 1.
7. Repeat.