Morestern's idea was simple.
He had noticed a few uninvited guests in Dorians' underground palace. His plan was to hide in a safe place while this group of intruders fought Dorians. The best situation would be for both of them to be gravely injured, weakening their battle capabilities. He would then appear and reap all the benefits.
This was a perfect plan!
After casting a high-level Invisibility spell on himself, Morestern slowly crept into an alleyway in the underground palace. This was already his third time passing through his route. He clearly remembered the position of the two skeleton Warriors at the side of the alleyway and skillfully avoided them. Following which, he quickly reached the security hall.
The hall was extremely quiet as Dorians had returned to the depths of the underground palace. In the hall, the security beasts patrolled the area tirelessly, not giving anyone the opportunity to sneak into the palace.