[IC] New Crobuzon & the World Beyond

[Betimi]

[[OoC: I'm not sure what darkness vulnerability means but I assume it takes extra damage while in magical darkness.  On the other hand, you guys were trying to find light spells to push back the darkness and your elemental can cast 8 daylight spells per day!!

Extrapolating from creatures that have vulnerability to light; it should mean plus 50% damage from spells and effects that have the [darkness] descriptor?

Admittedly that is a pretty rare descriptor; mostly just spells from the Vile Book of Darkness. So your ruling would expand that by a fair amount but probably not much when you think about how unique a situation that is