A Corrosive Poison constructed by Rhylance that is made with a combination of mercury-based toxins, binding solvents, and a pyrophorus liquid. Upon contact with air, the liquid will ignite, causing the toxins to evaporate into a gaseous compound. The corrosive nature of mercury causes painful rashes and burns on the victim's skin. Due to the volatile nature of this compound, extreme caution must be used when carrying.