Zavri, Blood-Oath Breaker

+1: Deal 2 damage to each of up to 2 target creatures. Create a 3/4 black green knight creature token with trample and deathtouch.
-1: Target opponent sacrifices 2 permanents, discards 2 cards, and loses 2 life. Create a 5/3 black red demon creature token with flying and menace.
-6: Each opponent gets an emblem with: at the beginning of your upkeep and end step, discard 3 cards, sacrifice three permanents, and lose 3 life.