This poisonous herb has no taste or smell and is extremely rare. According to legend, it only grows in locations where an individual once chose to relinquish great power, such as the spot of a king's abdication. A creature subjected to this (ingested/injury) poison must make a DC 16 Constitution saving throw. On a failed save, it takes 22 (4d10) poison damage and 9 (2d8) psychic damage and it is poisoned for 1 minute. While it is poisoned in this way, it takes 9 (2d8) psychic damage at the end of each of its turns. If it remains poisoned for the entire minute, it permanently suffers the effects of the feeblemind spell, and it gains two random forms of indefinite madness, as described in chapter eight of the Dungeon Master's Guide. On a successful save, the creature takes half as much damage and suffers no other effects.

Ingested. A creature must swallow an entire dose of ingested poison to suffer its effects, which may be delayed by digestion time. The dose can be delivered in food or a liquid. The DM may decide that a partial dose has a reduced effect, such as advantage on the saving throw or dealing only half damage on a failed save.

Injury. Injury poison can be applied to weapons, ammunition, trap components, and other objects that deal piercing or slashing damage and remains potent until delivered through a wound or washed off. A creature that takes piercing or slashing damage from an object coated with the poison is exposed to its effects.

Notes: Damage: Poison, Damage: Psychic, Poisoned, Damage, Debuff, Deception, Consumable