The Undead Dungeon is called "Abber Castle".
You can see the full dungeon map here.
The New Undead Characters that are in the Abber Castle are
- Axe Skeleton
- Blade Skeleton
- Crypt Knight
- Crypt Samurai
- Crypt Soldier
- Degore
- Skelly Soldier
- Treasure Chest Trap
- Undead Knight
- Undead Squire
- Undead Warrior
Note : A few points on the Abber Castle is explorable. All the Undead Characters are in Random-Encounters.
This is the end of my explanation, and I hope you understand better about the Undead Dungeon.
