Potion (Vapor) very rare
This glass orb seems to contain a dark red liquid that sparks random black flames. When this orb is thrown, dropped, or somehow broken, the fiery liquid inside the orb instantly ignites the air around it, creating a 20-foot radius ball of hellish flames. Whenever a creature begins its turn within the area, or enters the area for the first time on its turn it must succeed a DC 15 Constitution saving throw, taking 6d6 Fire damage on a failed save, or half as much on a successful one.
These magical flames are hot enough to scorch almost any non-magical substance even stone and metal. The pillar of flames illuminates a 60-foot radius sphere with bright light, temporarily suppressing any magical darkness. Flammable materials not being carried or worn immediately incinerate and become ash. Water and other fluids inside the zone instantaneously evaporate. Likewise, non-magical and non-silvered metals begins to melt upon entering the cloud and any weapon, armor, or tool composed of these susceptible metals become completely warped and no longer functional after 30 seconds (5 rounds) of continuous exposure.
The vapor’s effects last for 1 minute, or until it is dispelled or dispersed by a strong wind.