Enchant creature
As long as enchanted creature is blue, it gets +1/+1 and has "Whenever this creature deals damage to an opponent, draw a card."
As long as enchanted creature is black, it gets +1/+1 and has "Whenever this creature deals damage to an opponent, that player discards a card."
Non Foil / Near Mint - $8.14
Non Foil / Slightly Played - $7.33
Non Foil / Moderately Played - $6.51
Non Foil / Heavily Played - $4.88
Non Foil / Damaged - $4.07