Throwing spiders

Throwing spiders were metallic weapons similar to shuriken with extremely sharp edges.

Description
These weapons were stylized to look like spiders by the drow. If left in an area strong with faerzress, they became supernaturally sharp, capable of digging into wood and even stone with ease.

Notable Wielders
Before leaving the Underdark, Liriel Baenre used to visit Zz'Pzora's lair and leave objects in the intense faerzress of the location, hoping those items absorbed some of the magical emanations. "To buy a moment’s time, Liriel hurled a throwing spider at the hideous golem. The magic-enhanced weapon bit deep into the creature's throat. It would surely have killed a living creature; the golem had no blood to shed. It bared its fangs and kept coming." Xzorsh was given a few of these weapons, which were bestowed a different enchantment by Liriel. They would burrow into anything they were pressed against, be it flesh or even wood, which made them extremely lethal.