Does not move and cannot be pushed. All its attacks are at a distance and earth-damage.
They can attack you from a long distance even before you can see them on your screen! Some spawns are behind walls or plants, so you cannot reach them to attack with melee. In these cases, you need to use distance attacks to kill them.
Druids and Sorcerers: Try not to use Energy attacks on them. It is better to avoid them, as they only give 20 exp have a good defence and can do some serious damage, which can be dangerous for a low level.