Breath of Beleth

Named after the Arch Daemon of Fear, this poison creates an extremely powerful hallucinogenic effect which evokes a victim's worst fears. The poison is airborne and victims need only breathe it in to suffer its effects. The rare occasions when it was used have resulted in rooms full of people jumping out of windows or killing each other out of raw fear. Rumors say that the poison was quickly forbidden even by the Ebon Syndicate, deemed too dangerous, too extravagant, and too conspicuous. But chances are such a powerful substance wasn't simply abandoned, and others rumors say the Ebon Syndicate still uses a milder version during interrogation.

Breath of Beleth (Inhaled). A creature subject to the poison must succeed at a DC 15 Constitution saving throw or become poisoned for 1 minute. While poisoned, the creature immediately becomes frightened of all hostile creatures it can see, and must take the Dash action and move away from them by the safest available route on each of its turns, unless there is nowhere to move.