Prosper, Tome-Bound + Goldspan Dragon + Flameskull + Umbral Collar Zealot + Xorn

Prosper, Tome-Bound

Goldspan Dragon

Flameskull

Umbral Collar Zealot

Xorn

How it works

1. Activate Umbral Collar Zealot by sacrificing Flameskull.
2. When Flameskull dies, it triggers, exiling it and the top card of your library with the ability to cast one from exile this turn.
3. Resolve the Umbral Collar Zealot ability.
4. Cast Flameskull from exile by paying 1.
5. Prosper's second ability triggers, creating two Treasure tokens.
6. Activate the Treasures by tapping and sacrificing them, adding 2.
7. Repeat.

This clever loop turns the fiery resurrection of Flameskull into an engine of endless wealth by feeding it to Umbral Collar Zealot's sacrifice outlet. Every time Flameskull falls, its *Rejuvenation* ability exiles it alongside another card from your library, allowing you to recast the elemental for its normal cost. Thanks to Prosper, Tome-Bound's *Pact Boon*, casting Flameskull from exile triggers a bounty of Treasure tokens, which Xorn generously multiplies to ensure a net-positive mana yield. Goldspan Dragon completes the economic machinery by doubling the mana output of those sacrificed Treasures, leaving you with infinite colored mana, infinite death triggers, and your entire library laid bare in exile.