Jegantha, the Wellspring + Horde of Notions + Thousand-Year Elixir + Phantom Train

Jegantha, the Wellspring

Horde of Notions

Thousand-Year Elixir

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 intricate loop transforms Jegantha, the Wellspring into an endless engine of resurrection and growth by leveraging its own colored mana production to pay for Horde of Notions' recursive ability. Because Jegantha's {W}{U}{B}{R}{G} mana cannot pay generic costs, Horde of Notions' strict five-color activation requirement is uniquely suited to absorb it entirely. Meanwhile, Phantom Train acts as the necessary sacrificial outlet, gobbling up Jegantha to trigger its ability and place a +1/+1 counter while turning itself into a creature. Though Thousand-Year Elixir isn't strictly required for this specific five-color mana loop, it's worth noting how artifacts and creatures interact here to keep the graveyard pipeline flowing seamlessly.