Power of Astral Corruption

[Anglachel]

Originally posted by PDF:
I wonder if it's worth casting... What's the chance of mages being attacked by Horrors like ?

Astral Corruption : every mage has between 33 and 50% chance of having some kind of Horror. For multi-path rituals and items, each non-Blood path is checked independently and could lead to a separate attack. The attack occurs after the forged item is dropped in the inventory, so if it is a disposable mage, you may not care... but if it is a ritual, it may not stay up for very long. The number of gems used -including gems for boosting a ritual- appears to affect both the probability of attack and the size of the horror that appears.

I got that from Zen's dominions library site.