Warren Soultrader + Seedship Broodtender + Reveillark + Boss's Chauffeur + Susurian Voidborn

Warren Soultrader

Seedship Broodtender

Reveillark

Boss's Chauffeur

Susurian Voidborn

How it works

1. Activate Warren Soultrader by paying 1 life and sacrificing Reveillark.
2. When Reveillark dies, it and Susurian Voidborn trigger.
3. Resolve the Susurian Voidborn trigger, causing you to gain 1 life and target opponent to lose 1 life.
4. Resolve the Reveillark trigger, returning Seedship Broodtender and Boss's Chauffeur from your graveyard to the battlefield. Boss's Chauffeur will enter with a +1/+1 counter on it equal to the number of creatures you control.
5. When Seedship Broodtender enters, it and Boss's Chauffeur trigger, causing you to mill three cards and put a +1/+1 counter on Boss's Chauffeur.
6. Resolve the Warren Soultrader ability, creating a Treasure token.
7. Activate Warren Soultrader by paying 1 life and sacrificing Boss's Chauffeur.
8. When Boss's Chauffeur dies, it and Susurian Voidborn trigger.
9. Resolve the Susurian Voidborn trigger, causing you to gain 1 life and target opponent to lose 1 life.
10. Resolve the Boss's Chauffeur trigger, creating a 1/1 Citizen creature token for each +1/+1 counter on it.
11. Resolve the Warren Soultrader ability, creating a Treasure token.
12. Activate Warren Soultrader by paying 1 life and sacrificing a Citizen.
13. When the Citizen dies, Susurian Voidborn triggers, causing you to gain 1 life and target opponent to lose 1 life.
14. Resolve the Warren Soultrader ability, creating a Treasure token.
15. Repeat from step 12 two additional times.
16. Activate five Treasures by tapping and sacrificing them, adding 3.
17. Activate Seedship Broodtender by paying 3 and sacrificing it.
18. When Seedship Broodtender dies, Susurian Voidborn triggers, causing you to gain 1 life and target opponent to lose 1 life.
19. Resolve the Seedship Broodtender ability, returning Reveillark from your graveyard to the battlefield.
20. Repeat.

This intricate loop revolves around Warren Soultrader acting as a sacrifice outlet to continuously feed Reveillark back into your graveyard, which in turn perpetually recurs Seedship Broodtender and Boss's Chauffeur. As these creatures cycle endlessly, Boss's Chauffeur's alliance ability grows its counter count before it is sacrificed to produce an army of Citizen tokens that fuel further sacrifices. Meanwhile, Susurian Voidborn watches every single death and turns this endless cycle of recycling into an unyielding drain of life for your opponents. Finally, Seedship Broodtender leverages the Treasure tokens generated by Warren Soultrader to pull Reveillark back from the graveyard when the chain resets, ensuring the engine runs infinitely.