Mourg decided to enter the center of the cavern, and wait there. Listening for the tell-tale screams that would come from the Spectre's victims, Mourg readied his soulblade and waited.
He didn't need to wait long; the first scream came from a foolish fighter who had run to the end of the cavern. He wasn't alone; there was some kind of dark shadow next to him, doing something. While the poor quality of the light prevented Mourg from seeing exactly what was going on, he was glad he couldn't, as the screams indicated it wasn't pleasant. After a moment of hesitation, Mourg decided to try his spell to see how well it worked on something with more mind than a zombie. Making his brief chant and signs, Mourg threw it at the spirit just before the screams turned into the gurgles of a man near death.
OOC: For those of you who don't remember, this spell clouds the mind of an undead being, causing it to forget about my presence, and perhaps that of others, for a short time. More powerful undead creatures who have at least some semblance of a mind, however, can resist it, so it's up to Dragonson if the spell works or not.