Jegantha, the Wellspring + Horde of Notions + Hammer of Purphoros + Phantom Train

Jegantha, the Wellspring

Horde of Notions

Hammer of Purphoros

Phantom Train

How it works

1. Activate Jegantha by tapping it, adding that cannot be spent to pay generic mana costs.
2. Activate Phantom Train 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 the specialized mana from Jegantha, the Wellspring to feed the five-color activation cost of Horde of Notions, which pulls Jegantha right back out of the graveyard every single time. To keep the cycle going, Phantom Train acts as the necessary sacrifice outlet, feeding on Jegantha while conveniently growing larger with +1/+1 counters each iteration. Meanwhile, Hammer of Purphoros sits quietly on the board providing the team with haste so that Jegantha, the Wellspring is ready to tap for mana the exact moment it returns to the battlefield.