Jegantha, the Wellspring + Horde of Notions + Thermopod + Frostcliff Siege

Jegantha, the Wellspring

Horde of Notions

Thermopod

Frostcliff Siege

How it works

1. Activate Jegantha by tapping it, adding that cannot be spent to pay generic mana costs.
2. Activate Thermopod 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 ingenious loop is entirely powered by the precise color requirements of Jegantha, the Wellspring, whose tap ability yields exactly the five-color mana string needed to fund Horde of Notions. By utilizing Thermopod as a dedicated sacrifice outlet, Jegantha is fed directly back into the graveyard while simultaneously refunding a red mana to help smooth the engine. Meanwhile, Frostcliff Siege can be chosen for Temur to grant your attacking Elementals trample and haste, or for Jeskai to turn your endless creature onslaught into a card-drawing machine.