Jegantha, the Wellspring + Horde of Notions + Rising of the Day + Yahenni, Undying Partisan

Jegantha, the Wellspring

Horde of Notions

Rising of the Day

Yahenni, Undying Partisan

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 clever loop puts Jegantha, the Wellspring’s color-restricted mana to work by tapping it to generate the exact WUBRG required by Horde of Notions' activated ability. You then use Yahenni, Undying Partisan to sacrifice Jegantha, sending it to the graveyard where Horde of Notions can immediately pull it right back onto the battlefield for free. Meanwhile, Rising of the Day ensures that Jegantha enters the battlefield with immediate haste so it can be tapped again right away, turning your sacrifice loops into an endless cascade of triggers.