Warren Soultrader + Seedship Broodtender + Reveillark + Boss's Chauffeur + Aunt May

Warren Soultrader

Seedship Broodtender

Reveillark

Boss's Chauffeur

Aunt May

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, Aunt May and Boss's Chauffeur trigger.
4. Resolve the Aunt May 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, Aunt May 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, Aunt May triggers, causing you to gain 1 life.
17. Repeat.

This intricate loop turns Warren Soultrader into a relentless engine that funnels life and sacrifices into an overflowing vault of treasures and mana. The magic truly hums thanks to Reveillark, whose leaves-the-battlefield trigger pulls back both Seedship Broodtender and Boss's Chauffeur to endlessly replenish your board while milling your library. Meanwhile, Boss's Chauffeur grows large enough to flood the field with Citizen tokens upon death, and Aunt May quietly pads your life total with every single creature that enters the fray.