Ob Nixilis of the Black Oath

+2 : Each opponent loses 1 life. You gain life equal to the life lost this way.

-2 : Create a 5/5 black Demon creature token with flying. You lose 2 life.

-8 : You get an emblem with ", Sacrifice a creature: You gain X life and draw X cards, where X is the sacrificed creature's power."

Ob Nixilis of the Black Oath can be your commander.