Edimmu

In Mesopotamian belief edimmu belong to a class of spirit-beings (utukku/utukkus) and are specifically the restless dead produced when a corpse was not buried properly or when funerary obligations were neglected. Sources present the term (Akkadian eṭemmu) as referring to the spirits of the dead; when burial or rites were omitted the deceased became an edimmu, remaining active in the world and turning hostile toward the living. Modern renderings sometimes conflate spellings (edimmu/ekimmu), but the consistent conceptual origin across sources is funerary neglect producing a wandering, vengeful dead-spirit within the utukku taxonomy.

Classical description in the provided sources emphasizes incorporeality: edimmu are ‘completely or nearly incorporeal, “wind” spirits’ rather than solid corpses. In later modern and gaming sources their depiction varies widely — examples include skeletal, wind-lashed figures cloaked in tatters (Pathfinder / fandom descriptions), bat- or vampiric-like opponents in some video games, or undead-styled monsters in RuneScape — but these are explicitly derivative portrayals distinct from the traditional, insubstantial characterization (sources: Wikipedia; Pathfinder fandom; RuneScape wiki; game/fiction references).

Reported abilities and behaviors in the sources center on harm to the living arising from their status as restless dead: edimmu were thought to cause disease, to inspire criminal or antisocial impulses in people, and to 'suck the life out' of susceptible individuals or those who were sleeping. They could possess people in cases where taboos were broken (a cited example is failure to respect prohibitions such as eating ox meat). Because they are portrayed as insubstantial 'wind' spirits, their mode of damage is typically described in terms of life-draining and affliction rather than overt physical manifestations; sources also record that they might sometimes be appeased by funerary libations or repasts.