[Taqwus]

Attack chance and ferocity (lesser horror versus doom horror, say) depends on how much non-blood magical resource was used, I think. Casting a global with quadruple normal cost for boosting would probably draw a doom horror, while making trinkets might be relatively safe.

Attacks occur after forging/cast, if memory serves, so that even if an item forger is killed the item will still be in the lab. Not bad if your forging mage is an immortal like a demilich.