Jegantha, the Wellspring + Horde of Notions + Altar of Dementia + Tuktuk Rubblefort

Jegantha, the Wellspring

Horde of Notions

Altar of Dementia

Tuktuk Rubblefort

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 clever engine turns Jegantha, the Wellspring into a self-sustaining loop by funneling its exact five-color output directly into Horde of Notions's activation cost. Because Tuktuk Rubblefort grants your team haste, the resurrected Jegantha can be tapped immediately to regenerate the required mana, completely bypassing the restriction that its mana can't pay generic costs. Finally, Altar of Dementia converts this endless cycle of returns into an infinite sacrifice engine, milling out your opponents while fueling the graveyard for the Horde to pull from once more.