Huh? Where's the boss? Well, you can't see it, but he's stuck to the ceiling. Shake things up a bit by dashing the wall. Now you'll see a mean pair of eyes staring at you. What are you waiting for? Attack. However, you'll notice that while they split apart, they just won't separate. A bit more force is needed. Dash where they are loosely connected, and they'll split apart. Two lone Eyes are no match for your heroic Sword.