Red material

Exploration Stage: Hall of Departure
From: Isabelle
Description: I need your help again. I'm not very good at making potions. But I want to master this art. It's all about picking a good formula. I saw Martha make a decoction for a potion once. That's when I decided I would make something like that. I need coral extract. But I don't know where to find it. Maybe you can help me find it.
Completed: You found the coral extract! Thank you! Now I can complete the potion based on Martha's prescription. I hope one day I will be able to make potions as wonderful as Martha...I don't always get along with that spiritualist, but there is no denying my skill as a medicine man.