Time passed, and a year went by. During this time, Krune secluded himself to practice both Blacksmith and Alchemy. Unlike the Golden Stars Level, which was basically dependent on the Users' laws, the Diamond Stars Level had a lot more to be considered.
First of all, using Chaos Energy in the Side occupations was not easy. For example, in Alchemy, trying to synch the elements of the herbs during a concoction that uses Chaos Energy was ridiculously harder than the previous level. Even after an entire year of practice, Krune's level as Diamond Stars Alchemist was nothing more than Two Stars.
