Havengul Lich + Rooftop Storm + Warren Soultrader + Thunder of Unity

Havengul Lich

Rooftop Storm

Warren Soultrader

Thunder of Unity

How it works

1. Activate Havengul Lich by paying 1, allowing you to cast a Zombie from your graveyard this turn.
2. Cast the Zombie from your graveyard by paying 0 due to Rooftop Storm.
3. When the Zombie enters the battlefield, Thunder of Unity triggers, causing you to gain 1 life and each opponent to lose 1 life.
4. Activate Warren Soultrader by paying 1 life and sacrificing the Zombie, creating a Treasure token.
5. Activate the Treasure by tapping and sacrificing it, adding 1.
6. Repeat.