Silrivir Darken,the Black

+2: Each opponent losses 1 life. You gain life equal to the life lost this way.
-2: Put a 5/5 Black Demon creature token with flying onto the battlefield. You lose 2 life.
-8: You get an emblem with "Pay 1 colorless and 1 black, sacrifice a creature: You gain X life, draw X cards, Where X is the creature's power."