If by that you mean that he speaks the command word to detach it.  Ripping it off is a mistake he won't make; he visualized that process in advance.

Before he channels positive energy to heal himself, he'll see whether he can still cast and catch Light under his present circumstances.

If by that you mean that Keltham speaks the command word to detach it.  Ripping it off is a mistake he won't make; he visualized that process in advance.

Before Keltham channels positive energy to heal himself, he'll see whether he can still cast and catch Light under his present circumstances.