Alu, Psychic Assassin

+3: Discard a card. If that cards had converted mana cost 4 or more, draw a card. If it had converted mana cost 7 or more, draw 2 more cards.
+1: Destroy target creature with converted mana cost 2 or less. Its controller must discard cards equal to that creatures power.
-7: Scry 4, then destroy target creature, regardless of its abilities. You draw cards equal to that creature cards converted mana cost.