Poisoner's robe

A poisoner's robe were a variety of magical robes that were associated with poisons.

Description
The garment smelled particularly acrid and actually stinged to the touch.

Powers
Whenever the wearer of the poisoner's robes cast spells utilizing poison, those spells became significantly more potent. Unfortunately, the appeared to also poison the wearer themself a bit.

History
At some point, during or before the, someone wearing these robes was consumed by the phase spider matriarch of the Whispering Caverns.