Activate Warren Soultrader by sacrificing Nether Traitor and paying 1 life.
When Nether Traitor dies, Moonlit Wake and Sek'Kuar trigger.
Resolve the Moonlit Wake trigger, causing you to gain 1 life.
Resolve the Sek'Kuar trigger, creating a 3/1 Graveborn creature token.
Resolve the Warren Soultrader ability, creating a Treasure token.
Activate the Treasure by tapping and sacrificing it, adding .
Activate Warren Soultrader by paying 1 life and sacrificing the Graveborn.
When the Graveborn dies, Moonlit Wake and Nether Traitor trigger.
Resolve the Moonlit Wake trigger, causing you to gain 1 life.
Resolve the Nether Traitor trigger, causing you to pay to return Nether Traitor from your graveyard to the battlefield.
Resolve the Warren Soultrader ability, creating a Treasure token.
Repeat.
This clever loop turns Warren Soultrader into a self-sustaining sacrifice engine by cycling your creatures back and forth with Nether Traitor's recurring shadow ability. Every time a creature hits the dirt, Moonlit Wake immediately cushions the life cost while Sek'Kuar, Deathkeeper chips in extra material to keep the momentum going. Because the treasures you generate easily foot the mana bill, you can churn through this sequence endlessly to flood the board with infinite tokens, sacrifice triggers, and life.