Blasting Station + Thran Vigil + Persistent Constrictor

Blasting Station

Thran Vigil

Persistent Constrictor

How it works

1. Activate Blasting Station by tapping it and sacrificing Persistent Constrictor.
2. When Persistent Constrictor 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 Persistent Constrictor.
5. Resolve the Blasting Station trigger, untapping it.
6. Resolve the Blasting Station ability from step 1.
7. Repeat.