The moment and location at which Mr. Darkness made his appearance were very well chosen, which was in itself a testament to his ability. In addition, he was able to do so without being detected by Sheyan's over 80 points of Perceptive Sense, which was no small feat.
This was why Sheyan was willing to spend time having a conversation with him in this critical moment.
Hearing Sheyan's reply, the superficial smile on Mr. Darkness' face turned stiff. He never expected that with just a few words from him, this MT could deduce so much information.
Such a party which seemed small, but in fact had a double-MT configuration, was nothing short of terrifying. There's even such a scheming character in the party.... Mr. Darkness could not help but feel that he may be playing with fire.
He contemplated for a moment, and decided not to hide his intention.