It has a damage reduction effect on enemies--is this just for attacks with weapons, or also for spells & other abilities?
The text is: "Curse the earth around you in a radius of (2 + Talent Level) squares (maximum

for (3 + Talent Level) turns (maximum

. Any who stand upon it are weakened, reducing the damage they inflict by (-1 + 23 * ? Talent Level)%."