Jegantha, the Wellspring + Horde of Notions + Goblin Bombardment + Anger

Jegantha, the Wellspring

Horde of Notions

Goblin Bombardment

Anger

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 relies on Jegantha, the Wellspring to self-fund its own resurrection through Horde of Notions, whose five-color activation cost is paid entirely by Jegantha's unique color-restrictive mana ability. By directing Goblin Bombardment to sacrifice Jegantha the moment it resolves, you send the legendary Elk back to the graveyard to be immediately re-cast by Horde of Notions without paying its mana cost. Meanwhile, Anger passively grants haste to Jegantha from the graveyard as long as you control a Mountain, ensuring the Elk can tap for mana the exact millisecond it re-enters the battlefield.