Viscous Nasal Goo

If you control Bristleback you may cast this spell without paying its mana cost.
Buyback {2} (You may pay an additional {2} as you
cast this spell. If you do, put this card into your
hand as it resolves.)
Target creature gets -1/-1 until end of turn.
Oh, where are my manners. Ooh, excuse me, he heh
heh.