"No wonder," Ace uttered, listening to Dee3's explanation.
He now truly understood why Ria repeatedly stressed to him that successfully condensing a curse core and then consecutively using it to forge an innate curse tool on the very first try was paramount for a curse master. It would determine the course of their future.
This was especially true for the initial step in condensing one's curse core: concentrating all the negative emotions in one's heart and compressing them until they condense into a curse core. This required maintaining concentration for as long as possible with enough consciousness to spare to successively forge an innate curse tool using the condensed curse core and a selected curse item.