Hmmm. There's tension on whether this should attack itself or buff something else. It might be more interesting if it had vigilance someehow; so that the tension is whether to block it or block something else and risk the extra damage.

But this being almost nastier than "3/3 unblockable" for only 3 mana is really evil. That +3 to anything makes for evil combats.

Also: Since when does gree-blue get to do discard?

Iirc, blue is a distant second in discard. How frequently Intrigue should show up in cards with blue but sans black would be the question.