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, Falkenrath Noble triggers, causing target 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 elegant loop turns the tragedy of endless sacrifice into a perpetual motion machine of life and death. Warren Soultrader acts as the engine, converting your creatures into Treasures, while Falkenrath Noble watches the carnage to simultaneously drain your opponent and replenish your life total. That newly gained life is the key that unlocks Oathsworn Vampire's recursive nature, allowing you to cast it right back out of the graveyard to keep the machine churning. Meanwhile, Edgar Markov uses his Eminence ability to effortlessly supply an extra Vampire token body for the Soultrader to consume, ensuring you always have enough material to fund the cycle and close out the game.