Blasting Station + Furystoke Giant + Hardened Academic

Blasting Station

Furystoke Giant

Hardened Academic

How it works

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