A lantern that when lit, interrupts illusions, magical darkness, reveals the invisible, and might even cause the incorporeal to become vulnerable to physical attacks.
A weapon that changes form as it sees fit, changing shape so as to give it's wielder the best possible tool for the job.
A wonderfully ornate wood and silk dragon suit of the kind used in the Chinese Dragon dance. Flawlessly crafted, it is a wonder to see.
What about a 'criminal' society with distinct laws - for stealing, the larger the value of something stolen, the less punishment the courageous thief recieves (but must return it of course). For this pirates(?) caught petty thieves deserve to be punished harshly. If you take, you better take a lot.