Although the most famous alchemy formula he obtained this time is temporarily unusable, it does not mean that this thing has no value to Leonard at the moment.
For example, many of the potions used for healing or strengthening can now be produced, which include many very magical potion recipes.
Some potions can quickly heal infections, while some others can temporarily improve certain abilities of the human body, allowing people to accomplish things they originally could not do in certain situations.
Even more exaggerated is that some potions have extraordinary attributes, which can temporarily give Leonard and his historical followers extraordinary power. From a certain point of view, Leonard has received a very meaningful gift package this time.
