Jegantha, the Wellspring + Horde of Notions + Yahenni, Undying Partisan + Tannuk, Steadfast Second

Jegantha, the Wellspring

Horde of Notions

Yahenni, Undying Partisan

Tannuk, Steadfast Second

How it works

1. Activate Jegantha by tapping it, adding that cannot be spent to pay generic mana costs.
2. Activate Yahenni 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 the five-color mana restriction of Jegantha, the Wellspring into an endless engine by funneling it directly into Horde of Notions' ability, which fishes Jegantha right back out of the graveyard for free every time. To keep the cycle going endlessly without your legendary companion staying dead, Yahenni, Undying Partisan serves as the sacrificial outlet that neatly triggers all those death counts while growing into a massive threat. Meanwhile, Tannuk, Steadfast Second passively ensures that haste is granted to creatures that need it, keeping the mechanical execution fluid as Jegantha re-enters the battlefield over and over.