Jegantha, the Wellspring + Horde of Notions + Bloodflow Connoisseur + The Fire Crystal

Jegantha, the Wellspring

Horde of Notions

Bloodflow Connoisseur

The Fire Crystal

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 intricate loop transforms a five-color mana restriction into an unstoppable engine by leveraging Horde of Notions' ability to pull Jegantha, the Wellspring directly from the graveyard without paying its mana cost. Because Jegantha can tap to produce the exact five-color mana requirement ({W}{U}{B}{R}{G}) needed to activate Horde of Notions, and Bloodflow Connoisseur is on hand to cleanly sacrifice Jegantha in between recurrences, the cycle is entirely self-sustaining. While The Fire Crystal isn't strictly necessary for the core loop to close, its presence (along with Bloodflow Connoisseur) ensures that every iteration pumps out infinite death triggers, sacrifice opportunities, and a steadily growing +1/+1 counter threat.