The essence of addiction is a consumable ESSENCE.
This metal bottle contains the magical essence of addiction, distilled from the brain of a ment user. When inhaled, it greatly increases you [sic] addiction to ment - increasing both the positive effects of a high and the negative effects of a low.
In effect, this essence increases your ment use counter by two. If you have not yet used ment on your current dungeon run, you will suddenly experience a low.