Thus it was a vital Celtic belief that divinities might unite with mortals and beget children. Heroes enticed away to Elysium enjoyed the love of its goddesses--Cúchulainn that of Fand; Connla, Bran, and Oisin that of unnamed divinities. So, too, the goddess Morrigan offered herself to Cúchulainn. The Christian Celts of the fifth century retained this belief, though in a somewhat altered form. S. Augustine and others describe the shaggy demons called _dusii_ by the Gauls, who sought the couches of women in order to gratify their desires.[1212] The _dusii_ are akin to the _incubi_ and _fauni_, and do not appear to represent the higher gods reduced to the form of demons by Christianity, but rather a species of lesser divinities, once the object of popular devotion. These beliefs are also connected with the Celtic notions of transformation and transmigration--the one signifying the assuming of another shape for a time, the other the passing over of the soul or the personality into another body, perhaps one actually existing, but more usually by actual rebirth. As has been seen, this power of transformation was claimed by the Druids and by other persons, or attributed to them, and they were not likely to minimise their powers, and would probably boast of them on all occasions. Such boasts are put into the mouths of the Irish Amairgen and the Welsh Taliesin. As the Milesians were approaching Ireland, Amairgen sang verses which were perhaps part of a ritual chant: "I am the wind which blows over the sea, I am the wave of the ocean, I am the bull of seven battles, I am the eagle on the rock... I am a boar for courage, I am a salmon in the water, etc."[1213]