I'm on floor one using the small crossbow, I fired it at a Batty using wooden bolts and I dealt blasting damage. I was wondering where the blasting damage could have come from? I have no items that give blasting damage bonus and I have not yet invested any points in crossbows so I do not have the second skill "Crossbow Blast" yet. Is this a bug?
Yeah they're screwed up because of how the mundane damage groups they get -1 to slashing blasting and crushing if you hit them with any one of them.