Light pellet

Light pellets, also called daylight pellets, were magic items devised by drow to fight others of their kind. A stronger version called sun flash pellet existed too.

Description
Light pellets's creation process was to take a small piece of material like glass, rock crystal, or else, casting continual light on it by a cleric, coating it with fat or grease, rolling the coated thing in clay and then baking it hard. They were collected and stored in pouches. One pouch held three to twelve of them. A daylight spell was needed to craft them too. Sun flash pellets were created by using the exact same process except for the daylight spell, a sunburst spell was needed instead. Because those were very precious, they were stored one by one.

Powers
Light pellets had to be thrown to the ground to be used. On impact with the ground, they broke and blinding light, like a daylight spell, was unleashed. "Blinding" was not in the figurative sense but in the literal sense. Those who saw the light were blinded for two to five minutes. Users of the magic item averted this effect by masking or hooding themselves or by being trained in blind-fighting.

When it came down to the sun flash pellets, the light was actually harmful to creatures like vampires because the unleashed light was that of a sunburst spell.

History
Light pellets were invented by drow at some point before the 14 century DR with the intent to be used against other drow.

Reputation
They were treated like special weapons and stored with special care by the nobles.