Jegantha, the Wellspring + Horde of Notions + Umbral Collar Zealot + Akroma's Memorial

Jegantha, the Wellspring

Horde of Notions

Umbral Collar Zealot

Akroma's Memorial

How it works

1. Activate Jegantha by tapping it, adding that cannot be spent to pay generic mana costs.
2. Activate Umbral Collar Zealot 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 fascinating loop turns Jegantha, the Wellspring into an endlessly recurring engine, using its own unique mana restriction as a feature rather than a bug. By tapping Jegantha for exact color requirements, you can sacrifice it to Umbral Collar Zealot to filter your library with surveil, and then pay Horde of Notions's matching five-color activation cost to pull Jegantha right back out of the graveyard onto the battlefield. Akroma's Memorial quietly sits on the board granting the entire loop haste, ensuring Jegantha can tap the very moment it returns so you can repeat the process indefinitely.