Sorin gave the lich a contemptuous look as he slowly followed the others into the building. "You have a strange idea of hell, lich." As it was, Innistrad had a hell, and Sorin was quite familiar with it. The fiery maw of Ashmouth was the source of the power that had turned him into a vampire, and Sorin had made an expedition into it long ago when researching his own condition. 

The building was apparently some manner of leisure or entertainment establishment, from what Sorin could tell. Drinks, games and other such distractions were plentiful. Rather than have his focus broken by them, Sorin stayed on guard. This place gave him an uncomfortable feeling, even without being so obviously the subject of forceful time/space displacement. The ancient vampire's hand never strayed from his sword.

His suspicions were confirmed by the appearance of the strange entity that claimed credit for the building's abduction. Though he did not draw the Parasite Blade, Sorin's grip on it tightened as he spun to face the unknown being. As it spoke, he tried to read its mans signature, but found himself unable. It was though it was not even really there, merely a shadow, as obvious as it seemed. This greatly perplexed Sorin, as even illusions had mana signatures. 

In any case, Sorin now had a prime suspect for the individual responsible for bringing him here. Rather than mouth off as he was sure the others were about to do, he remained silent, yet firm. He advanced to the front of the group, standing among the closest to the being, slowly gathering mana and his sword ready to be drawn.