Jace, Exiled by Krath

+1: Create 2 2/1 spellslinger creature tokens with "sacrifice this creature whenever it is dealt damage"
-2: You may have Jace, Exiled by Krath become a copy of target creature an opponent controls. (You may still activate his loyalty abilities)
-6: Destroy target artifact or enchantment, draw cards equal to half its mana value, rounded down