Captain Storm, Cosmium Raider + Lesser Masticore + Blasting Station + Leyline of Transformation

Captain Storm, Cosmium Raider

Lesser Masticore

Blasting Station

Leyline of Transformation

How it works

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