Anafenza, Unyielding Lineage | Nether Traitor | Pitiless Plunderer

(and one other card)

Activate
Ashnod's Altar by sacrificing
Nether Traitor, adding ({C} magic symbol) ({C} magic symbol) .
When
Nether Traitor dies,
Anafenza and
Pitiless Plunderer trigger, creating a 2/2 Spirit creature token and a Treasure token.
Activate the Treasure by tapping and sacrificing it, adding ({B} magic symbol) .
Activate
Ashnod's Altar by sacrificing the Spirit, adding ({C} magic symbol) ({C} magic symbol) .
When the Spirit dies,
Nether Traitor and
Pitiless Plunderer trigger.
Resolve the
Nether Traitor trigger, causing you to pay ({B} magic symbol) to return it from your graveyard to the battlefield.
Resolve the
Pitiless Plunderer trigger, creating a Treasure token.
Repeat.