Ungoliant

Ungoliant is a monster that inhabits the Einbroch area.

Background
Also called the Master of the Caves in Einbroch, it's said to live deep in the caves where it guards peculiar ores and minerals with strange powers. At first people thought it was just an old fairy tale, but it actually started appearing again about ten years ago when the tunnel cave-ins started to happen. As sightings of Ungoliant increased, more and more tunnel cave-ins occurred. It is assumed that the miners have inadvertently intruded into its territory. According to legend, ancient giants snuck into a mine to steal coal from normans. But they made too much noise while they were digging and awoke Ungoliant. When the miners went to work the next morning, they found the bloodied bodies of those giants. After that, people have feared the threat that Ungoliant poses to anyone entering the mines.

Ragnarok Online II
In RO2, this monster can only be found in a dungeon.

Trivia

 * Ungoliant is a fictional character in J. R. R. Tolkien's legendarium (Middle-earth mythology) described as an evil spirit in the form of a spider. She is mentioned briefly in The Lord of the Rings, and plays a supporting role in The Silmarillion.