Nightshade

Nightshade

Not to be confused with the rank-smelling plant of the same name, the fungal cap from this rare and unusual mushroom may be either crushed or boiled into a tea. The mage must always use great care when handling nightshade, for it is not only a very potent hallucinogenic, but also extremely noxious. Indeed, harvesting it is usually only possible during the deepest night (thus the name). It adds illusory or poisonous elements to a spell.

Nightshade could only be found in Ultima IV in the depths of Spiritwood or near the Shrine of Sacrifice. It can be bought in later games, but is usually expensive due to its toxicity. In Ultima IX, it appeared as a leafy plant rather than its historically fungal portrayal, a misleading description. 

Lore