He unleashed a torrent of words he had grown accustomed to hearing in his past life from his employers—a very difficult kind of vocabulary that only an employee could possess.
Just days earlier, he had overheard a conversation between the head maid and the Count, where she lamented that it was already an accepted truth in the capital that Count Vinlig's son was devoid of mana and, thus, utterly worthless.
Of course, it was not difficult for Lucian to understand that this information was most likely spread by that bitch.
Although Lucian typically dismissed such insults, he found value in using this information to his advantage at present.
By mentioning the mana-less issue, it would clearly lead the Count to believe that these words could only have come from those outside the Vinlig territory, given that he had tried to suppress this information as much as possible within his jurisdiction.