Warren Soultrader + Seedship Broodtender + Reveillark + Boss's Chauffeur + Zulaport Cutthroat

Warren Soultrader

Seedship Broodtender

Reveillark

Boss's Chauffeur

Zulaport Cutthroat

How it works

1. Activate Warren Soultrader by paying 1 life and sacrificing Reveillark.
2. When Reveillark dies, it and Zulaport Cutthroat trigger.
3. Resolve the Zulaport Cutthroat trigger, causing you to gain 1 life and each 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 Zulaport Cutthroat trigger.
9. Resolve the Zulaport Cutthroat trigger, causing you to gain 1 life and each 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, Zulaport Cutthroat triggers, causing you to gain 1 life and each 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, Zulaport Cutthroat triggers, causing you to gain 1 life and each opponent to lose 1 life.
19. Resolve the Seedship Broodtender ability, returning Reveillark from your graveyard to the battlefield.
20. Repeat.

This intricate loop is masterminded by Warren Soultrader, whose sacrifice outlet fuels the entire engine by converting creatures into Treasures while Zulaport Cutthroat drains your opponents out of the game with every single death. Reveillark serves as the primary engine recursive piece, returning both Seedship Broodtender and Boss's Chauffeur whenever it hits the graveyard to continually swell your board with tokens and accumulate counters. Meanwhile, Boss's Chauffeur grows larger with every entering ally and floods the battlefield with Citizens upon death to sustain the sacrifice requirements. Finally, Seedship Broodtender self-mills your library to find your pieces and utilizes its mana-activated ability to bring Reveillark right back, ensuring the cycle spins infinitely.