A mutant hits me with his claws (NOT warp weapons), and I parry with my power sword. What happens to him? Does he suffer damage?

Mh... Just noticed in the Power Field description that Natural Weapon do not suffer damage from a parrying power sword...

That seems... Weird...

Weird yes but that is due to the issues with it causing lasting damage ala crit effects. If it could just flatly sever natural weapons without going through wounds first, it would be very potent. Natural weapons are also a massively wide group, which would likely end up with them working rather odd in certain areas if they interacted with severing.

Perhaps it should, if redone, cause some amount of automatic damage to the target...but yeah. It's for game balance/mechanics reasons rather than fluff ones.