C186 Veined Carving

After the old man saw it, he smiled and said, "Yes, it's a pretty good sword. It's just that the metal inside is too monotonous." With that, the old man waved his right hand and a knife appeared in his grasp, "Before carving, what kind of soul do you want, what kind of crystal do you want as a source, and what kind of combination do you want? Of course, if both are from a single magical beast