Azru, Goblin Arsonist

+1: You may destroy target artifact with converted mana cost 3 or less. Deal 1 damage to that artifacts controller.
-3: Until end of turn, whenever you cast an instant or sorcery spell, you may deal 1 damage to each creature target player controls.
-6: You get an emblem with, whenever you cast an instant or sorcery spell, you may deal 4 damage to target opponent.