Dracula had not expected Regus to sense his approach.
Dracula, amongst countless other techniques that were not common in the modern times, had a special concealment technique that made him impossible to detect.
Back in the olden times, there was not a single individual who could see through this concealment, however, apparently with the changing times it was not as efficient as before.
In the few short seconds that he needed to go from the dungeon exit to Regus's palace, Regus was able to detect his presence and raise the alarm, a feat that absolutely delighted Dracula.
" I don't know, who you are, but I'll find out everything I want to know about you from interrogating your corpse " Regus said as he brandished his sword to fight against Dracula
However, much to his surprise, Dracula parried his sword attacks using nothing but a single finger.
