Interesting box find - an enruned frosted glass potion of thick amber venom

[Zhiart]

an enruned frosted glass potion of thick amber venom

This is a magical item of some sort.

The potion's song blurs, and you are unable to make sense of any of it.
You sense that the frosted glass potion will disintegrate after its last magical charge has been expended.

Never found a potion in a box before. Tried to 405 it with a bard and a wizard, but got this.

The essence swirls as it flows in a fog of chaotic patterns around the potion. You can't make any sense from the patterns.

Anyone have any ideas what this is before I drink it to find out?

[JNewhall]

I wouldn't drink it! It says it's venom, so odds are high that it will poison you. (Unless you've gone all Dread Pirate Roberts and developed immunity.) I would guess it adds poison flares to a weapon when poured on the weapon.