Jegantha, the Wellspring + Horde of Notions + Yahenni, Undying Partisan + Dynaheir, Invoker Adept

Jegantha, the Wellspring

Horde of Notions

Yahenni, Undying Partisan

Dynaheir, Invoker Adept

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 relies on Jegantha, the Wellspring to self-fund its own resurrection, tapping to produce the exact five-color mana requirement demanded by Horde of Notions. Because Jegantha's mana cannot be spent on generic costs, Horde of Notions steps in to cast Jegantha directly from the graveyard for free, bypassing those restrictions entirely while satisfying the color requirement. Meanwhile, Yahenni, Undying Partisan acts as the necessary sacrifice outlet to send Jegantha back to the graveyard, all while fueling its own growth through endless death triggers. Though Dynaheir, Invoker Adept is present in the entourage, the core engine effortlessly loops Jegantha and Horde of Notions through Yahenni's blade to generate an unbounded storm count and endless sacrifice triggers.