"The Undead Realm is a very vast and diverse place. It has many species, and it is closely related to the Death Domain. I'm not sure if Your Highness knows about it yet, but the people from the Death Domain are able to control the Undead Species and bring them out during a fight, but that's not all there is to it,"
"The Death Domain can only establish links with weaker Undeads like Skeletons, Zombies, etc., but there is also another branch of Undead that is uncontrollable by them. Even their King wasn't able to control them," Rale responded.
"Interesting. So the Vampires must be the uncontrollable ones," Ryder muttered.
"Exactly, just like we have High Demons, the Undead Realm have High-Rank Undeads. Those are the ones that are able to think for themselves, and in some instances, they are even smarter than other species. The Vampires are considered High Undeads. And some of them are as strong as our Dukes as well," Rale explained.