Vitriol is an archaic term in alchemy used to refer to materials that are now known as metal sulfates.
Design
Vitriol appears as a green lion devouring a sun. This is in reference to a common depiction of Agua Regia in alchemical art. Agua Regia is a sulfate that is capable of dissolving gold - the lion is the solvent, and the sun is the gold.
This section is a stub. You can help Megami Tensei Wiki by expanding it.
No reason provided.
Trivia
Due to a bug, by manipulating the shop inventory to purchase a blank item, it is possible refight Vitriol as the next random encounter and receive infinite Flame Swords.