Blasting Station + Glen Elendra Archmage + Hardened Academic

Blasting Station

Glen Elendra Archmage

Hardened Academic

How it works

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

This clever loop relies on Glen Elendra Archmage and its persist ability to endlessly sacrifice itself to Blasting Station, dealing infinite damage to your opponents in the process. Each time the Archmage leaves the graveyard, Hardened Academic's trigger places a +1/+1 counter on it, which immediately cancels out the -1/-1 counter from persist via state-based actions so the Archmage can keep dying over and over. Meanwhile, every creature entry untaps Blasting Station to keep the firing squad running indefinitely.