Grue

Grues are hostile Shadow Elementals that spawn using the Underground Spawner as well as using the (optional, disabled by default) Darkness Spawner.

When it is pitch black, you are likely to be eaten by a Grue! It is impossible to see these Shadow Elementals in complete darkness. Cinder and Argus Elementals can fuse to create powerful Grues.

Being Shadow Elementals, Grues spawn where it is dark and usually deep underground.

Grues have a nasty melee attack that inflicts blindness on top of this they will occasionally teleport behind their victim. Also, if their victim has any good effects active, Grues will devour these effects and heal!