Warren Soultrader + Seedship Broodtender + Reveillark + Boss's Chauffeur + Sephiroth, Fabled SOLDIER // Sephiroth, One-Winged Angel

Warren Soultrader

Seedship Broodtender

Reveillark

Boss's Chauffeur

Sephiroth, Fabled SOLDIER // Sephiroth, One-Winged Angel

How it works

1. Activate Warren Soultrader by paying 1 life and sacrificing Reveillark.
2. When Reveillark dies, it and Sephiroth, Fabled SOLDIER // Sephiroth, One-Winged Angel trigger.
3. Resolve the Sephiroth, Fabled SOLDIER // Sephiroth, One-Winged Angel 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 Sephiroth, Fabled SOLDIER // Sephiroth, One-Winged Angel trigger.
9. Resolve the Sephiroth, Fabled SOLDIER // Sephiroth, One-Winged Angel 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, Sephiroth, Fabled SOLDIER // Sephiroth, One-Winged Angel 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, Sephiroth, Fabled SOLDIER // Sephiroth, One-Winged Angel 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 vicious loop relies on Warren Soultrader as the sacrificial engine to feed a continuous cycle of resurrection and death. When Reveillark hits the graveyard, its leaves-the-battlefield trigger pulls back both Seedship Broodtender and Boss's Chauffeur, whose own entrance builds a growing pile of counters to convert into Citizen tokens upon death. Meanwhile, Sephiroth, Fabled SOLDIER // Sephiroth, One-Winged Angel watches every single death occur, turning the relentless procession of sacrifices into a lethal drain of your opponent's life total.