Back then, he requested information on beasts and their usefulness to him and secondly a sword, in exchange he let go of his Metal Three Claws.
After reading the book, Morningstar felt that it was worth it. For starters, it explained how some of the beasts' blood can be used to create either a potion that can bring a tiny boost to someone's strength, and speed or even be used as a substance to create a top-notch healing potion.
The bone marrow of some beasts like dragons, Demons and a lot more have a strong concentration of energy inside and can be used to concoct various types of drugs or create a special curse. Some animals, after reaching the basic stage can now be called beasts as they will now have chances to keep evolving stronger and awake their intelligence and even humanoid form.