Cast Oathsworn Vampire either from your hand or graveyard by paying 1.
Edgar triggers, creating a 1/1 Vampire creature token.
Activate Warren Soultrader by paying 1 life and sacrificing Oathsworn Vampire.
When Oathsworn Vampire dies, Funeral Room triggers, causing each opponent to lose 1 life and you to gain 1 life.
Resolve the Warren Soultrader ability, creating a Treasure token.
Repeat steps 3 through 5 once, sacrificing the Vampire token instead.
Activate two Treasures by tapping and sacrificing them, adding 1.
Repeat.
This loop is fueled by Warren Soultrader, which cheerfully converts your disposable creatures into Treasure tokens at the low cost of 1 life each. Every time you cast Oathsworn Vampire, Edgar Markov's *Eminence* ability chimes in to supply a free 1/1 Vampire token, padding your ranks so you have bodies to feed to the Soultrader. The crucial life-gain trigger comes from Funeral Room // Awakening Hall (using its *Funeral Room* side), which drains your opponents and hands you the life you need to legally cast Oathsworn Vampire right back out of your graveyard. By cycling your Vampires and Treasures through this grim engine, you create a self-sustaining cycle of sacrifices and life-drains that closes out the game in a heartbeat.