Castiel's jaw clenched visibly when the man mocked him. He really disliked him, especially when he spoke rudely to Dinah. Before he was aware of it he stepped forward and smacked his hand against the seal solidly, staring directly at the man challengingly. He'd never been one for intimidation when he didn't have the power to back it up, he wasn't overly good at it, but the words really got under his skin. And Castiel hadn't even begun to rethink his anger that the magical couple had sealed Sam away from him when the young man was doing something dangerous that he should have had a friend around to help with.
He let out a slow breath after he'd made his point and glanced back at Dean, reminding himself that this wasn't the time to be throwing up such a display. He stepped back again, waiting for the hunter to make the move, ready to walk in immediately behind Dean if he went in.