i meant we talked about how he teleports, and really i only keep calling it teleporting due to not being able to thing of a better word for it. realistically he's not teleporting, more breaking himself down into partials moving himself around then reforming himself in whatever order he feels fits the situation, meaning that due to the method used it would be very easy to only break down a part of himself or reform part of himself separately, but through this method there is also the risk of loosing the limb if it gets separated from the shadows supporting it. 

if he took his arm off, and a strong light hit his shoulder he'd start to bleed and feel pain as if the arm had been taken off by a blade, if the light hit the arm while it was formed away from him it would also act like it had been cut off. he can fix it with shadows but he needs more time than he would have in a fight and if left to long the arm would be beyond being able to re-attach, he could just as easily bleed out and die from his shoulder.