Gravekeeper

Gravekeeper (グレイブキーパー) is an undead that appeared after the Catastrophe in Mass for the Dead.

Appearance
An amalgam of several skeletons merged as a single being. Most of the skeletons are merged on its back, making it look like a hunchback.

Abilities
It is said to be a middle-tier undead monster, above that of a Skeleton Warrior.

Trivia

 * This type of undead is said to be a rare occurrence, as even though the negative energy is increasing, it is unlikely that the undead will occur as much as several low-level undead gather instead.