Blight ichor

Blight ichor is an illegal liqueur brewed from a fungus native to Blightshore. It is bitter in taste, green in color, and has psychedelic properties.

Properties
Any creature that isn't an undead or construct that drinks blight ichor has advantage on Intelligence and Wisdom checks, as well as vulnerability to psychic damage, for one hour. Each time a does is consumed, they must make a DC 15 Constitution saving throw. On a failure, the user is poisoned for 1d6 hours and suffers effects similar to the Confusion spell for one minute.

Undead creatures react to blight ichor differently. If an undead consumes blight ichor, it has advantage on Dexterity checks and is imune to being frightened for one hour.