Vii'Arax, Prodigy Apprentice

Quick Study—{p/u}{u/b}{u/b}{ut}Copy target spell or ability used by an opponent this turn. You may cast the copy without paying its mana cost. This ability may be used as an interrupt.

Devil in the Arena—{u/b}{u}{u}{p/u}{p/u}{p/u}{t}Counter target spell, then this creature fights target creature an opponent controls. Until end of turn, Vii'Arax, Prodigy Apprentice gains Deathtouch, Hexproof, and Indestructible.