Empty Storage Closet
A part of Oaklore Castle is the storage closet, an unknown area. To enter it's premises, you must be at least level 999. Even so, it's just a pun. And anyway, it's an EMPTY storage closet. What would you expect to find in there? However, Level 999 may be attainable in the future, thanks to level caps from updates in the future. The closet may also be a reference to the closet in Yulgar's inn, in AdventureQuest.