Jegantha, the Wellspring + Horde of Notions + Altar of Dementia + Tannuk, Steadfast Second

Jegantha, the Wellspring

Horde of Notions

Altar of Dementia

Tannuk, Steadfast Second

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 turns Jegantha, the Wellspring into an endless fuel source by relying on its ability to produce the exact five-color mana required to activate Horde of Notions. Once Horde of Notions pulls Jegantha straight back out of your graveyard for free, Altar of Dementia steps in to convert Jegantha into a fresh sacrifice, feeding an endless cycle of self-mill. Meanwhile, Tannuk, Steadfast Second passively ensures that Jegantha's repeated returns happen without missing a beat by granting your creatures haste.