Living Darknesses are oozes that seem to be made of concentrated magical darkness. They were present in the Ervelt mine, but only in areas of thick magical darkness. They were likely disturbed by the recent team of Fey scouts that came to the mine, and may be responsible for the death of the Hirsin tribe member.
While the oozes don’t hit particularly hard, their attacks can cause blindness, deafness or silencing and they can engulf their opponents, trapping them within their void-like bodies.
There is evidence that they feed on organic flesh, as the body of the Hirsin tribe member was missing (while his clothes were left behind looking clean and faded), but the presence of a Fey corpse intact but devoid of color indicates they may feed on more than just the flesh.