Eternal Scourge + Ashnod's Altar + Planar Void + Pitiless Plunderer

Eternal Scourge

Ashnod's Altar

Planar Void

Pitiless Plunderer

How it works

1. Activate Ashnod's Altar by sacrificing Eternal Scourge, adding CC.
2. When Eternal Scourge dies, Pitiless Plunderer and Planar Void trigger.
3. Resolve the Pitiless Plunderer trigger, creating a Treasure artifact token.
4. Resolve the Planar Void trigger, exiling Eternal Scourge from your graveyard.
5. Activate the Treasure by tapping and sacrificing it, adding 1.
6. Cast Eternal Scourge from exile by paying 3.
7. Repeat.