Regius wasn't dumb at this point. How could he not know that Chordis had done something? The voice that he presumed was the tower originally had never returned after their first error. The shadows never spoke, so floor after floor he only heard Chordis talking to him over and over again. It was less like the tower speaking over a loudspeaker and more like Chordis speaking directly in his mind.
This had caused him to stop several times to check his own body and mana world several times to ensure that he had now allowed any of his strings in and he only continued after knowing that he was clear of them. Regius continued down the hallway towards the sounds of battle. His family owned a beautiful mansion that most of the family lived in some part of at some time but by the time he was born, most of his siblings had moved out and it was just him and the valkyries on most days.