To create medicine, you must first obtain the second floor of Sharance Tree by clearing the Privera Forest dungeon and traveling to the Univir Settlement
Once the second floor grows in, Marjorie or Marian will offer to build a Pharmacy for 2000G and 40 wood
you are not required to know the recipe beforehand in order to actually craft. However, you will not know the percentage of success until after you are successful.
clearing the
skirmish with all merchants unharmed nets you a random item
merchants will appear in battle as NPCs
If you fight a
skirmish with two enemy groups present, you'll end up fighting both
groups at once; surviving this onslaught nets you a random item and
3000G.