Very nice card, I like what you did here For the second ability, I would re-word it, only because you can't technically take control of spells. Plus you can make the ability even better if you were to maybe say:
3UT: Counter target sorcery or instant; you may copy that spell and choose new targets for it.
that way, you can still deny him his spell, and take control in a way. Additionally, if you don't want to copy you don't, so then it acts like a counter spell. A little expensive for a counter spell, but just perfect for an activated ability p.s. I really miss the provoke