Activate Umbral Collar Zealot by sacrificing Nether Traitor.
When Nether Traitor dies, Anafenza and Pitiless Plunderer trigger, creating a 2/2 Spirit creature token and a Treasure token.
Resolve the Umbral Collar Zealot ability.
Activate the Treasure by tapping and sacrificing it, adding .
Activate Umbral Collar Zealot by sacrificing the Spirit.
When the Spirit dies, Nether Traitor and Pitiless Plunderer trigger.
Resolve the Nether Traitor trigger, causing you to pay to return it from your graveyard to the battlefield.
Resolve the Pitiless Plunderer trigger, creating a Treasure token.
Resolve the Umbral Collar Zealot ability.
Repeat.
This loop transforms your graveyard and sacrifice outlets into an endless engine of profit, fueled entirely by the clever interplay between your fallen threats and the artifacts they leave behind. You begin by using Umbral Collar Zealot to sacrifice Nether Traitor, sending the shadow creature to the graveyard while its owner triggers Pitiless Plunderer to mint a fresh Treasure token and Anafenza, Unyielding Lineage to muster a 2/2 Spirit token. That very Treasure provides the black mana needed to revive Nether Traitor via its own ability, and sacrificing the leftover Spirit token through Umbral Collar Zealot keeps the recycling cycle going indefinitely. Every iteration yields a continuous stream of surveils, treasures, and death triggers, letting you dig endlessly through your deck while generating boundless resources.