Reagent
In the real world, a reagent is something added to a system to cause a chemical reaction, or added to test if a reaction occurs.[1] In Ultima Online, a reagent operates in a similar manner. They are used by spellcasters to cast spells, by scribes to create spell scrolls, and by alchemists to create potions.
Reagents can be looted from various mobiles, found on the ground, or purchased from NPCs. By default, NPCs sell up to 20 of the reagents they carry, but if they sell out of a given reagent, the next time they refresh their inventory, the amount they have for sale will double. This can be repeated until they reach a maximum of 999 for sale at a single time.
Different NPC types sell different reagents:
