The High-Effect Illuminating Bomb is an F-Level Alchemy Product related to Potion Studies, triggered by non-magical channel inertial triggering, which makes it easily usable by the general public as a typical simple alchemy prop.
Ordinary people rarely think to use it in this way. Though there had been innovative attempts in the past, most records of its use in actual combat were not particularly successful. Fang Hong, in fact, had been impressed by this item during a battle at the Elf Ruins and hence tried his hand at making a few as spares beforehand, not expecting them to come in handy here.
He had made a total of three, but two of them had been water-damaged during a previous battle on a rainy night, making them unusable. The last one, well-protected as it was mounted on a hand crossbow, remained.