Board Thread:Speculation House/@comment-35757751-20180602170102/@comment-26018514-20180708043327

No, I think the bug is her interface to use the powers, and the SEW only affects the bug, no bug, no powers usage, so when it died, she needed a new Grimm interface, she also needed a new arm because the bug was petrified in both ways... it tried to escape by running out of her arm farthest from Ruby, but as it turned to stone it shredded her nerves in the cluster on the shoulder(at the least). Without those nerves, your hand's fine motor control would be fucked no matter how much arm is left.