Use the ''Duplicate items'' trick on a paintbrush. After getting at least 
twenty paint brushes, go outside of
''A Fighting Chance'' in the Imperial City Market District at midnight. Drop 
a paintbrush. Notice that it will
float. Get on top of the brush and repeat the process to form a set of 
stairs. Once you get high enough to
reach the top of the A Fighting Chance store, get on top of the building and 
look for a chest that is locked.
The lockpick level is very difficult. Lockpick it and look inside to find an 
odd sword without a name.
The sword has no attack, breaks easily, and cannot be sold.