Prosper, Tome-Bound + Eternal Scourge + Ashnod's Altar + Yawgmoth's Will

Prosper, Tome-Bound

Eternal Scourge

Ashnod's Altar

Yawgmoth's Will

How it works

1. Cast Yawgmoth's Will by paying 2.
2. Activate Ashnod's Altar by sacrificing Eternal Scourge, adding CC.
3. Eternal Scourge is exiled instead of being put into your graveyard due to Yawgmoth's Will.
4. Cast Eternal Scourge from exile by paying 3.
5. Prosper's second ability triggers, creating a Treasure artifact token.
6. Activate the Treasure by tapping and sacrificing it, adding 1.
7. Repeat.

This elegant loop bridges the graveyard and exile zones to extract boundless value from unlikely components. With Yawgmoth's Will active, your graveyard acts as an extension of your hand while safely steering any doomed permanents straight into exile. This is where Eternal Scourge shines, allowing you to repeatedly cast it from exile after feeding it to Ashnod's Altar for two colorless mana. Meanwhile, Prosper, Tome-Bound observes you playing a card from exile and rewards your resourcefulness by generating a Treasure token every single iteration. Sacrificing that Treasure helps fund the Scourge's return, cementing an endless cycle of sacrifices and spellcasting.