[Baalz]

No way, it doesn't affect your own troops, that would be pretty crappy. Maybe that's why nobody uses it if that's the perception. The description even says enemy troops, and it's easy to verify as there's a special icon that appears on the character sheet when it takes effect. It is a +4 to the MR save though so I find it useful to cast it a couple times with cheap penetration boosters to get a good coverage. It also rapidly loses its effectiveness the later in combat you cast it, thus the suggestion to cast it with a few mages turn one.