Aqua Elf Transformation Harp 30-day limited period (event)
Dimensional item Transformation harp that turns you into an Aqua Elf. Can be used for 30 days. Cannot be exchanged, dropped, or destroyed. Can be stored in a private warehouse.
Not dropped by monsters.
Cannot be spoiled.
The chances are official (x1). On servers with x10, x100 and higher rates, drop and spoil come more often.