This alchemical oil can coat one weapon or up to 12 pieces of ammunition. Applying the oil takes 1 minute. For 1 hour, the coated item is magical and deals 3d4 bonus acid damage on a hit. 

Devouring Oil. This noxious-looking purple oil gives off fumes reminiscent of the smell of stomach acid when used. The strange alchemy used to create the oil ensures that it will only dissolve living material, so the coated item will remain unharmed (unless it is alive), but constructs and undead are immune to the bonus damage.

Notes: Damage: Acid, Buff, Consumable