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.
Magic should have side effects, both expected and unexpected - fortuitous and deplorable. Expected side effects add anticipation, while unexpected ones increase the drama of the scene. The result can be comedic or dire, it dpends on which circumstances work best for your game.