The original dragon was a beneficent creature, the personification of water, and was identified with kings and gods. But the enemy of Osiris became an evil dragon, and was identified with Set. The dragon-myth, however, did not really begin to develop until an ageing king refused to be slain, and called upon the Great Mother, as the giver of life, to rejuvenate him. Her only elixir was human blood; and to obtain it she was compelled to make a human sacrifice. Her murderous act led to her being compared with and ultimately identified with a man-slaying lioness or a cobra. The story of the slaying of the dragon is a much distorted rumour of this incident; and in the process of elaboration the incidents were subjected to every kind of interpretation and also confusion with the legendary account of the conflict between Horus and Set.