Black Eyes
This drug is a specially mixed combination of lichen, fungus, and dark mud found in some hills or river basins.
Effects.
Darkvision range doubled. If the user does not have Darkvision, the user gains Darkvision 60 ft. This effect lasts for 3 hours.
Disadvantage on all Intelligence and Concentration Tests
The user gains 1d12 +10 Temporary Hit Points. This effect lasts for an hour.
Disadvantage on Perception (Sight) and all ranged attacks
Overdose. If a second or more dose of Black Eye is used within twelve hours the user must succeed a Wisdom save DC 5 + 2 for each dose. On a failure the user enters a Berserker rage (like the class feature, but must keep attacking the nearest target) for 10 minutes, and is then reduced to -1 hit points and collapses.
Addiction. DC 12 (Constitution), weekly dose - failure to get a dose results in a 1d3 reduction to one Ability Score.