Why, Resultant of Testing

+1: Create a 0/1 Thrall token with "Sacrifice this creature: Add (B) to your mana pool and lose 1 life."
-1: Sacrifice any number of creatures you control: Gain 3 life X times where X is the number of creatures sacrificed this way.
-8: You get an emblem with "At the beginning of each opponent's end step, destroy up to one creature, artifact, and land that opponent controls."