Achlys

The word achlys means a mist or darkness, in Homer the mist that falls over the eyes of someone dying. As a figure she is first described in the pseudo-Hesiodic Shield of Heracles, standing among the Keres, the spirits of violent death, as a pale, wasted and wretched creature, with tears running down her cheeks.

Some late writers, such as Damascius reporting an earlier author, put her among the very first beings. This is unusual and comes from a late source, so it should be read as one more philosophical version, not a standard tale.

She appears in modern retellings as a goddess of misery or poison. The ancient evidence is limited to those few passages.