Jegantha, the Wellspring + Horde of Notions + Altar of Dementia + Concordant Crossroads

Jegantha, the Wellspring

Horde of Notions

Altar of Dementia

Concordant Crossroads

How it works

1. Activate Jegantha by tapping it, adding that cannot be spent to pay generic mana costs.
2. Activate Altar of Dementia 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 loop relies on Jegantha, the Wellspring generating the exact five-color mana requirement for Horde of Notions, which acts as your recursion engine by playing Jegantha straight from the graveyard without paying its mana cost. Altar of Dementia provides the immediate sacrifice outlet that triggers infinite deaths while milling your opponents out of the game. Finally, Concordant Crossroads ensures that Jegantha gains haste the very moment it enters the battlefield, allowing you to tap it for mana immediately without waiting a turn.