Jegantha, the Wellspring + Horde of Notions + Altar of Dementia + Garna, the Bloodflame

Jegantha, the Wellspring

Horde of Notions

Altar of Dementia

Garna, the Bloodflame

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 mesmerizing loop relies on Jegantha, the Wellspring to single-handedly generate the exact five-color mana requirement for Horde of Notions, thanks to the fact that Jegantha's tap ability yields precisely {W}{U}{B}{R}{G} without generic costs to trip you up. Once Jegantha is sacrificed to Altar of Dementia to mill your library and fuel your graveyard, Horde of Notions steps in to cast Jegantha right back out of the graveyard for free. To keep this engine firing smoothly in any sequence, Garna, the Bloodflame grants haste to your creatures so Jegantha can tap immediately upon return, while also offering a handy backup recursion clause if needed.