That they had no hint of what was on the other side of the door did not deter Cygnus as it perhaps should have, it drove him. He had been uncertain if their children were on the other side of the door up to and including the moment that Frederick disappeared. Now he had little doubt that somehow this door was pulling people inside...or perhaps something in there was pulling them inside? His jaw clenched, imagining what could happen to his Narcissa on the other side of the door.
Tracing his wand around the frame of the door, he tried to sense what was on the other side, what awaited them. He was tired of waiting, and being here just staring at a door like a simpleton. "Perhaps we should try it again." He said, his wand going up to duel whatever was on the other side of the door.