Jegantha, the Wellspring + Horde of Notions + Thermopod + Urabrask the Hidden

Jegantha, the Wellspring

Horde of Notions

Thermopod

Urabrask the Hidden

How it works

1. Activate Jegantha by tapping it, adding that cannot be spent to pay generic mana costs.
2. Activate Thermopod by sacrificing Jegantha.
3. Activate Horde of Notions by paying , causing you to cast Jegantha from your graveyard without paying its mana cost.
4. Repeat.

This clever loop turns the strict color constraints of Jegantha, the Wellspring into an engine for infinite red mana by leaning entirely on the five-color activation costs of Horde of Notions. You begin by tapping Jegantha to generate the exact WUBRG required by Horde of Notions, feeding Jegantha into Thermopod's sacrifice ability to turn that mana into the red source needed to pay for the Horde's activation. Horde of Notions then casts Jegantha straight back out of your graveyard for free, ready to be sacrificed and tapped all over again. While Urabrask the Hidden's passive ability isn't strictly necessary to make the loop function, it ensures that your recycled Jegantha is immediately ready with haste every single time it re-enters the battlefield.