Blasting Station + Scuzzback Marauders + Hardened Academic

Blasting Station

Scuzzback Marauders

Hardened Academic

How it works

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