Jegantha, the Wellspring + Horde of Notions + Goblin Bombardment + Concordant Crossroads

Jegantha, the Wellspring

Horde of Notions

Goblin Bombardment

Concordant Crossroads

How it works

1. Activate Jegantha by tapping it, adding that cannot be spent to pay generic mana costs.
2. Activate Goblin Bombardment 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 fiery loop turns Jegantha, the Wellspring into an endless engine of rebirth by exploiting its own unique color requirements; because its tap ability yields precisely the five-color classification needed to pay Horde of Notions' activation cost without wasting a single drop on generic mana, it funds its own resurrection entirely. Once you sacrifice Jegantha to Goblin Bombardment to fling damage at any target, Horde of Notions immediately plucks it back out of the graveyard for free. Finally, Concordant Crossroads ensures that Jegantha gains haste the very instant it enters the battlefield, allowing you to tap it straight away and repeat the slaughter indefinitely.