The vampire frowns but nods. He shuts his eyes and taken several deep breaths. Vampires are naturally gifted in both legilimency and occlumency. Having thick protective walls in place around his mind is no doubt second nature to Corvin, after so long. Though dhampirs receive a similar inclination towards the arts, Harry has neither the experience nor the skill necessary to break through Corvin’s walls. If he’s going to gain access, he needs to be let in.