Vitriolic Red Fluid is an item that drops on the Beomarbhan (Waterfall Stag) in Vale of Balor
It is supposed to have a single charge of Aoe instant DD that you can fire from inventory.
Vitriolic Red Fluid : http://camelot.allakhazam.com/item.html?citem=9402
Beomarbhan: http://camelot.allakhazam.com/db/search.html?cmob=6489
Here's what happens when you try to fire it on Phoenix, or when you try to equip it in one of your jewelry slots. You will also see that the description of the item is wrong and doesn't indicate a radius : https://imgur.com/a/xGZqSrc
It is supposed to have a single charge of Aoe instant DD that you can fire from inventory.
Vitriolic Red Fluid : http://camelot.allakhazam.com/item.html?citem=9402
Beomarbhan: http://camelot.allakhazam.com/db/search.html?cmob=6489
Here's what happens when you try to fire it on Phoenix, or when you try to equip it in one of your jewelry slots. You will also see that the description of the item is wrong and doesn't indicate a radius : https://imgur.com/a/xGZqSrc