Stalwart Successor + Blasting Station + Thunderblust

Stalwart Successor

Blasting Station

Thunderblust

How it works

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