Illyka, Lust for Malice

+3: sacrifice a creature, Illyka, Lust for Malice deals damage equal to its power to each player, opponents can't gain life until your next turn
+1: put a 1/1 black slaver creature token with 'at the end of each turn this creature deals 1 damage to its controller'
-7: you get an emblem with 'whenever you are dealt damage, if it is the third time or more this turn, this embelm deals 6 damage to each opponent'