一本炼金术教科书约13世纪磐石堡的人们研制了许多“药水”和“灵药”，用于植物学实验，既能在温室里促进植物生长，也能将其杀死。确切的配方已经无从知晓。
英文原文
An alchemical textbook
c. 13th century
Many 'potions' and 'elixirs' were developed by the people of Castle Rock to use in their botanical experiments, either to encourage - or kill - plants within the greenhouse. The exact formulas used are unknown.