[@UnusualStranger] I..  see. If it dazes the shadow, or makes the Nightshade lose control over it? Or maybe it makes it dissapear temporarily?

I mean, I am trying to get this working from a science standpoint, which might be a bit silly on a fantasy environment like this. But I can only guess that the flash, if it doesn't outright kill the shadow, it should at least disorient its darkness-calibrated senses. And the grenade itself is still filled with explosives, so there physical pain and heat from one going off near the guy should disorient him in a large enough degree to lose control. BTW, how powerful are these guys supposed to be in terms of rank? I can only guess they are high on rank, but I'm not sure how exactly.