He created Homo Sapiens(humans) and then went to sleep.The Homo Sapiens soon rebelled against him. Hyne is said to have begun to lose the war with the Homo Sapiens who rebelled against him, and offered up half of his body to them along with his powers as a peace offering. However, he had tricked them and offered up a powerless skin of himself, taking his power with him in his escape.
It may very well be that Hyne escaped death at the hands of the Light Warriors and eventually gave up his powers unto some Homo Sapien Females. While Hyne is regarded as the creator of Homo Sapiens, the legend still retains information suggestive of him having been an asshole and that People rose up against him.
The legend goes that the Great Hyne created people. The sorceresses were given a fragment of Hyne's own power. It's hard to determine how many sorceresses exist today, for many keep their powers concealed. However, it is believed that they avoid spreading their power too thin.