Jegantha, the Wellspring + Horde of Notions + Goblin Bombardment + Tyvar, Jubilant Brawler

Jegantha, the Wellspring

Horde of Notions

Goblin Bombardment

Tyvar, Jubilant Brawler

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 loop transforms Jegantha, the Wellspring into an endlessly recurring engine of destruction, fueled by the colorful mana its tap ability provides. Because that mana can only pay colored costs, Horde of Notions steps in as the perfect pay-off, using those exact five colors to pull Jegantha straight back from the graveyard without paying its mana cost. Meanwhile, Tyvar, Jubilant Brawler ensures Jegantha doesn't have to wait around with summoning sickness once it returns, allowing it to tap immediately. Finally, Goblin Bombardment converts this constant cycle of resurrection into infinite damage and death triggers by constantly sacrificing the elk elemental before the process begins anew.