Throwing Scarab

Bred by the daelkyr Valaara, this bizarre symbiont burrows into the palm of its host, secreting razor-sharp chitin blades that can also be used as throwing weapons. When you attune to the scarab, it fuses with one of your hands, visible only as an iridescent, chitinous growth on your palm.
For every attack you make as part of the Attack action on your turn, you can extrude a shard of razor-sharp chitin from the symbiont into your empty hand, using it for the attack. The shard counts as a magical Simple Melee weapon with which you are proficient. It has the Finesse, Light, and Thrown properties with a normal range of 20 feet and a long range of 60 feet. On a hit, it deals 1d4 Piercing damage and 1d4 Acid damage. The shard dissolves as soon as it hits or misses its target.