An explosive light shredder - it launches a ball of compressed, damaging warped rays of light, which after a short duration explodes. The rays then damage everything within a moderate range. Like a shrapnel bomb, but without the need for crafting, and can be used in greater quantities.

[Brainstorm sounds entirely too pleased with himself for creating a rather nasty device.]

Or in more blunt terms, I made a flashlight that shoots grenades.

[He makes an amused scoffing noise.]

If I had a Shanix for every time I heard that from someone...