Board Thread:Off Topic/@comment-26397825-20170714130723/@comment-25396609-20170723174612

The ball bearings in Spirti's weapon were actually my suggestion; though i can't recall what my reasoning for that was at the time.

Weapons are protected by the user's aura, proven fact. That gives the needles enough reinforcement to do their job before retracting again (spring loaded for rapid deployment and extraction.) They are also protected by the claws somewhat; and designed in such a way that the claws themselves do the hard work of getting through the target's skin and deploy inside the body to increase penetration of the injected dust.

They are indeed for targets that lose their aura; and for grimm.