The evil wind, the terrible wind,
That sets one's hair on end.
Against these the spirits of heaven and earth are invoked. The text proceeds:
The utukku that seizes hold of a man,
The ekimmu that seizes hold of a man,
The ekimmu that works evil,
The utukku that works evil.
And after invoking against these demons, likewise, the spirits of heaven and earth, the text passes on to an enumeration of a long list of physical ills: sickness of the entrails, of the heart, of the head, of the stomach, of the kidneys, of the limbs and muscles, of the skin, and of the senses, which are all ascribed to the influence of the demons.
Apart from the demons that are naught but the personification of certain diseases, it does not appear that the demons were limited in their power to one specific kind of action. In other words, sharp distinctions between the demons do not appear to have been drawn. As appears from the extracts above translated, the utukku, shedu, alu, and ekimmu were grouped together, and hardly regarded as anything more than descriptive epithets of a general class of demons. At the same time it appears likely that at one time they were differentiated with a greater degree of preciseness. So the ekimmu appears to be the shadowy demon that hovers around graves, a species of ghost or vampire that attacks people in the dead of night and lays them prostrate. Lilu and lilitu are the spirits that flit by in the night. Of a specific character likewise are the conceptions connected with a demon known as ardat lili, 'maid of the night,' a strange female 'will-o'-the-wisp,' who approaches men, arouses their passions, but does not permit a satisfaction of them. Great importance being attached by the Babylonians to dreams, the belief in a 'maid of the night' was probably due to the unchecked play of the imagination during the hours of sleep. Bad dreams came at the instigation of the demons, and such a demon as the rabisu or the labartu appears to have been especially associated with the horrible sensations aroused by a 'nightmare.'[347] Again the utukku is represented at times as attacking the neck of man; the gallu attacks the hand, the ekimmu the loins, the alu the breast. But these distinctions count for little in the texts. Utukku becomes a general name for demon, and gallu, alu, and shedu are either used synonymously with utukku or thrown together with the latter in a manner that clearly shows the general identity of the conceptions ultimately connected with them. The same is the case with the rabisu and gallu, with the labartu, akhkhazu, and ekimmu.
The demons were always given some shape, animal or human, for it was a necessary corollary of the stage of religious thought to which the belief in demons belongs, that the demon must not only be somewhere, though invisible to mankind, but also in something that manifests life. Among animals, those calculated to inspire terror by their mysterious movements were chosen, as serpents appearing and disappearing with startling suddenness, or ugly scorpions, against whom it was difficult to protect oneself, or the fabulous monsters with which graves and pestiferous spots were peopled. Regions difficult of access—the desert, the deep waters, the high mountains—were the favorite haunts of the demons. Some of these demons were frequently pictured in the boundary stones between fields, in order to emphasize the curses hurled upon the head of him who should trespass on the lawful rights of the owner of the land.[348] It is to such demons embodied in living form that epithets such as the 'seizer,' the 'one that lurks,' and the like apply with peculiar aptness. In a tablet belonging to a long series of incantations,[349] we find references to various animals—the serpent, the scorpion, monsters—that are regarded as the embodiment of demons.