Potions
Here at COFF, we have video chats, as I mentioned a while ago when I talked about WitchCrafting BOS. That study has come and gone, and we have moved on to a new BOS study covering potions. These BOS can be their own individual books, or they can be encapsulated into a much larger volume if you wish. These studies are meant to go beyond the basics and help you to create a reference for future use, which I am sure you will always be adding to and changing as you change.