So with folks doing the Kobold Daily quests we've learn some interesting things about those "Voidsent" we call bombs.
Apparently Kobold Alchemists are quite adapt at crafting bombs and grenades. Hell they can even set them to be remote detonated with proper placing. This may mean that the bomb species may not be so unnatural to this world than we thought. Or it could be that the kobolds found a way to reverse engineer and grow bombs