Requires

Prosper, Tome-Bound must be on the battlefield. Eternal Scourge must be on the battlefield. Ashnod's Altar must be on the battlefield. Mimic Vat must be on the battlefield. Mana needed:

Steps

1. Activate Ashnod's Altar by sacrificing Eternal Scourge, adding .
2. Mimic Vat's imprint ability triggers, exiling Eternal Scourge and returning any previously exiled creatures to their owners' graveyards.
3. Cast Eternal Scourge for .
4. Prosper triggers, creating a Treasure token.
5. Resolve Eternal Scourge, allowing it to enter the battlefield.
6. Activate the Treasure token by tapping and sacrificing it, adding one mana of any color.
7. Repeat.

Results