Sek'Kuar, Deathkeeper + Warren Soultrader + Nether Traitor + Trostani, Selesnya's Voice

Sek'Kuar, Deathkeeper

Warren Soultrader

Nether Traitor

Trostani, Selesnya's Voice

How it works

1. Activate Warren Soultrader by sacrificing Nether Traitor and paying 1 life.
2. When Nether Traitor dies, Sek'Kuar triggers, creating a 3/1 Graveborn creature token.
3. When the Graveborn enters the battlefield, Trostani triggers, causing you to gain 1 life.
4. Resolve the Warren Soultrader ability, creating a Treasure token.
5. Activate the Treasure by tapping and sacrificing it, adding .
6. Activate Warren Soultrader by paying 1 life and sacrificing the Graveborn.
7. When the Graveborn dies, Nether Traitor triggers, causing you to pay to return Nether Traitor from your graveyard to the battlefield.
8. When Nether Traitor enters the battlefield, Trostani triggers, causing you to gain 1 life.
9. Resolve the Warren Soultrader ability, creating a Treasure token.
10. Repeat.

This vicious little engine uses Warren Soultrader as a tireless sacrifice outlet that converts creatures into Treasure tokens to fund a continuous loop. Whenever Nether Traitor hits the graveyard, you pay the black mana you just generated to bring it right back, while Sek'Kuar, Deathkeeper simultaneously steps in to reward you with a brisk 3/1 Graveborn creature token every time a nontoken creature perishes. That recursive swapping back and forth between Nether Traitor and the Graveborn tokens fuels an endless cycle of sacrifices, effortlessly buffered by Trostani, Selesnya's Voice quietly gaining you a point of life off every single creature's toughness as it enters the battlefield.