Jegantha, the Wellspring + Horde of Notions + Woe Strider + Fervor

Jegantha, the Wellspring

Horde of Notions

Woe Strider

Fervor

How it works

1. Activate Jegantha by tapping it, adding that cannot be spent to pay generic mana costs.
2. Activate Woe Strider 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 elegant engine uses Jegantha, the Wellspring as both its own fuel and its own target, tapping for the exact five-color mana requirement needed to activate Horde of Notions. Because Jegantha must be sacrificed to Woe Strider to trigger the loop, Woe Strider's sacrifice outlet and scry ability effortlessly turn the continuous recycling of the legendary Elk into endless death triggers and filtering. Finally, Fervor ensures that Jegantha gains haste the exact moment it enters the battlefield from the graveyard, allowing it to be tapped immediately to start the cycle all over again.