Jegantha, the Wellspring + Horde of Notions + Mass Hysteria + Bloodflow Connoisseur

Jegantha, the Wellspring

Horde of Notions

Mass Hysteria

Bloodflow Connoisseur

How it works

1. Activate Jegantha by tapping it, adding that cannot be spent to pay generic mana costs.
2. Activate Bloodflow Connoisseur 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 and its restriction-defying ability to generate the exact five-color mana required to recast it directly from the graveyard. Horde of Notions provides the recurring engine to pull Jegantha back onto the battlefield, neatly bypassing all generic mana costs thanks to Jegantha's own color constraint. Meanwhile, Mass Hysteria ensures that Jegantha gains haste the instant it returns, allowing it to be tapped for mana immediately without summoning sickness. Finally, Bloodflow Connoisseur acts as the sacrificial outlet that neatly resets the loop while growing larger with infinite +1/+1 counters each time.