Warren Soultrader + Seedship Broodtender + Reveillark + Boss's Chauffeur + Suture Priest

Warren Soultrader

Seedship Broodtender

Reveillark

Boss's Chauffeur

Suture Priest

How it works

1. Activate Warren Soultrader by paying 1 life and sacrificing Reveillark.
2. When Reveillark dies, it triggers, 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.
3. When Seedship Broodtender enters, it, Suture Priest and Boss's Chauffeur trigger.
4. Resolve the Suture Priest trigger, causing you to gain 1 life.
5. Resolve the Boss's Chauffeur trigger, putting a +1/+1 counter on Boss's Chauffeur.
6. Resolve the Seedship Broodtender trigger, causing you to mill three cards.
7. Resolve the Warren Soultrader ability, creating a Treasure token.
8. Activate Warren Soultrader by paying 1 life and sacrificing Boss's Chauffeur.
9. When Boss's Chauffeur dies, it triggers, creating a 1/1 Citizen creature token for each +1/+1 counter on it.
10. When the Citizens enter, Suture Priest triggers that many times, causing you to gain that much life.
11. Resolve the Warren Soultrader ability, creating a Treasure token.
12. Activate Warren Soultrader by paying 1 life and sacrificing a Citizen, creating a Treasure token.
13. Repeat step 12 two additional times.
14. Activate five Treasures by tapping and sacrificing them, adding 3.
15. Activate Seedship Broodtender by paying 3 and sacrificing it, returning Reveillark from your graveyard to the battlefield.
16. When Reveillark enters, Suture Priest triggers, causing you to gain 1 life.
17. Repeat.

This intricate loop turns Warren Soultrader into a relentless engine of sacrifice, using Reveillark to continuously resurrect your graveyard while Suture Priest neatly buffers your life total against the cost. Boss's Chauffeur acts as a brilliant multiplier, cashing out its accumulated counters into an army of Citizen tokens whenever it dies, which in turn provide the fodder needed to fund future activations. Meanwhile, Seedship Broodtender chips away at your library and eventually uses the generated mana to loop Reveillark right back onto the battlefield, ensuring the cycle can repeat indefinitely.