Though I don't know if it shouldn't or not. Based on the name used (Decay), everything decays, even EMF over time. My take on the spell was like Raiders of the Lost Arc, when the guys all instantly start aging to the point of death, then bones, then dust, then nothing
PvK said:
BTW, is this resisted by magic resistance, or does any hit (that gets past Protection??) doom the target?
PvK
Resisted by a normal MR check. Bleed is the same way and coincidentally the same MR check.
A good non-resistance spell early on is Hand of Dust. Unfortunately getting a semi-resilent caster to cast it on SC's is almost as hard as it is, to get them in the first place .