The Grade Interval

Arthur now understood why his Agility stat's grade had increased.

"So crossing the 25 start mark is needed for the grade to improve, huh…" Arthur muttered to himself.

He analyzed further and wondered if all the ranks would be categorized in the same manner.

'I can at least assume that the stat points needed to increase a single grade is at least 25 stat points. If the grade increases once more at 51, I'll know that my hypothesis is correct. Though the question still stands whether this rank increase is linear or not.' Arthur thought to himself.

It could be possible that as the ranks increased, the stats needed would also increase. 

Another thing that Arthur noticed as the effects of the stat increase.