So, he lazily sat and returned his back to rest while listening to the useless knowledge from this master.
The potion he was making was called the spirit fire potion. It was one that could enhance one's foundation and help spirit masters increase their absorption of spirit energy from the world and got stronger with time.
The higher the grade the better the effects. However, in William's eyes, this wasn't any good potion at all. After all it was just directed to increase one's spirit power, without any regard to spirit purity.
William knew in the eyes of alchemy, spirit techniques weren't their turf, yet spirit purity was. He got a way to increase the purity grade of any spirit master's spirit using the right potions to do so.
William listened without interest and wasn't even bothered to watch the master while concocting the potion. It was a very retarded way of making a potion with many flaws and mistakes done by this master.