Jegantha, the Wellspring + Horde of Notions + Phantom Train + Kratos, God of War

Jegantha, the Wellspring

Horde of Notions

Phantom Train

Kratos, God of War

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 clever loop revolves around turning Jegantha, the Wellspring into a recursive engine, using its tap ability to produce the exact five-color mana requirement needed to activate Horde of Notions. By sacrificing Jegantha to Phantom Train, you not only fuel the Train's ability to grow with +1/+1 counters and animate itself, but you also bin Jegantha so Horde of Notions can immediately drag it back onto the battlefield for free. Meanwhile, Kratos, God of War quietly ensures your whole board benefits from haste so that everything is primed and ready to keep churning through this sacrifice-and-return cycle.