If a knowledgeable person were to look at Corey's status screen and compare it to what it was on the day of the announcement of the Battle of Chosens, he or she would begin to question their common sense and all that they knew.
The changes to Corey's status screen could only be described in one word- Unbelievable.
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After the announcement of the Battle of Chosens, Corey knew that he had to improve his stats and skills as much as he could before the Battle of Chosens began, and he did what majority of the Underworld residents did- He trained.
He absorbed as many elemental stones as possible to increase his attributes, however, he obviously could not max out his attributes despite absorbing quite a lot of elemental stones.
Due to his attributes surpassing the universal limit of Violet Star, he needed way more elemental stones to bring up his attributes by even a single percent.