Stalwart Successor + Blasting Station + Rendclaw Trow

Stalwart Successor

Blasting Station

Rendclaw Trow

How it works

1. Activate Blasting Station by tapping it and sacrificing Rendclaw Trow
2. When Rendclaw Trow dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
3. When Rendclaw Trow 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 Rendclaw Trow
6. Resolve the Blasting Station ability from step 1
7. Repeat.