Prosper, Tome-Bound + Ugin, the Ineffable + Eternal Scourge + Mimic Vat + Goblin Bombardment

Prosper, Tome-Bound

Ugin, the Ineffable

Eternal Scourge

Mimic Vat

Goblin Bombardment

How it works

1. Activate Goblin Bombardment by sacrificing Eternal Scourge.
2. Mimic Vat triggers, exiling Eternal Scourge from your graveyard and returning any previously exiled creatures to their owners' graveyards.
3. Resolve the Goblin Bombardment ability, dealing 1 damage to any target.
4. Cast Eternal Scourge for 1.
5. Prosper triggers, creating a Treasure token.
6. Resolve Eternal Scourge, allowing it to enter the battlefield.
7. Activate the Treasure token by tapping and sacrificing it, adding one mana of any color.
8. Repeat.