Potions are the most accessible form of magic for the masses, since they are simply drunk like water without requiring lessons in complicated spellcasting, although they can be used only once and so they could not supplanting scrolls as the primary method of magical Incantation.
These liquids and powders are of great interest, and discovered several years after Berzio created the GNUSTO spell.
The first of these potions, which obviates the need for food and drink, was named after Berzio himself.