User blog comment:Smijes08/Giles' Death/@comment-4199083-20120823055054

It has to be considered that certain feats of magic maybe only available from higher beings. Like after Tara died and Willow called Osiris to bring her back but he said he couldn't because it was a human death at a human's hands. Since Giles was murdered by a supernatural being under supernatural circumstances it could count despite the method of murder.