A command available to any player level 80 or above. A certain teacher in
most major cities across the lands will let you study with them to attain
higher levels of strengths. Here you can increase your player stats above
what they could be trained to before, as well as various other things.
Typing "Study" alone will show you a list of your current options, assuming
that you are above level 80 of course. To study anything you will need to
collect fragment essences from around the lands, different types of fragments
will buy you different things.
See also: CLEANSE FRAGMENTS FREPORT