Felon said:
Hmm. Doesn't sound like part of the Conan canon proper...is this a Lin Carter or [shudder] L. Sprague De Camp tale?
No, Hour of the Dragon is an original Howard, one of the first and one of the best. But, it is not as bad as it might sound...
Hadrathus, the priest of Asura, provides Conan with no direct magical aid. Asuran priests are more concerned with unveiling and dealing with illusion and falsehood, and the few spells they seem to know deal with this. Asuran priests are noted for their imformation gathering and dispersal abilities. Only once during the entire story do the priests of Asura do anything "magical," and that is to provide a heavy mist as a cover for a ruse. Hadrathus also claims to have cast some counterspells, but that seems to have been through his use of the Heart of Ahriman. So really, only two spells... a counterspell, and a mist.
As for the witch, Zelata, she provides Conan with visions of what is occuring in his capital, and what has occured in the past. She also casts a sleep/recuperation spell.
Xaltotun, the Bad Guy, however, casts more flashy and potent spells. But then, he is the Bad Guy, and also the most potent wizard in all of the world...