This delightful loop turns the graveyard into a bustling engine by exploiting Nether Traitor's ability to pull itself back from the dead whenever anything perishes. Ashnod's Altar provides the initial sacrifice outlet and generates the colorless mana needed to fund the shadow creature's return, while any other fodder creature helps kick off the sequence. As the traitor repeatedly leaves the graveyard, Kheru Goldkeeper and Quintorius, Field Historian both trigger off that zone change to reward you with a Treasure token and a 3/2 Spirit token. You can then crack the Treasure for the black mana required to recur Nether Traitor, leaving you with infinite colorless mana, death triggers, and a massive army of spirits.