My coworker has a black white deck that dominates, its main cards are 3 desecration demons, 3 gifted aetherborns, 2 vampire nighthawks, whip of erobos, wurmcoil engine, Vraska and Sorin plainswalkers (that he ALWAYS has out at the same time) Sun titan, aegis of the gods, 2underworld connections, mind sludge, 3 mind rots, dark steel plate, and a sol ring.

This deck is just so broken it feels like, his aetherborns consistently gain him life while posing as a birth threat being a 2/3 deathtouch lifelink, his sol ring allows for turn 2 desicration demons, his whip gives everything lifelink and a chance to come from the grave, sun titan keeps his graveyard small, and underworld connections keeps him 3/4 turns ahead of me