Grenbera Devil Leech

Grenbera Devil Leech is a monster that can be found and fought in the Grenbera Swamp of Helheim.

Background
In YGGDRASIL, Grenbera Devil Leeches were one of the monsters that spawned around the swamp area where the Great Tomb of Nazarick was located originally. It guards the unconquered Great Tomb of Nazarick from enemy players and NPCs if caught on sight trying to trespass into their territorial ground before reaching the tomb.

Appearance
Since they are leeches, this can suggests that they have the form of predatory or parasitic worms.

Abilities
Grenbera Devil Leeches are monsters that have adapted to living in a swamp-like environment. In YGGDRASIL, their level can reach as high as level 64.

Trivia

 * The members of Ainz Ooal Gown avoided confronting this monster as they made their way to Nazarick.