Cloud Giant Harp

You can play a soothing melody on this harp that puts creatures to sleep. The harp is of particular use against giants. A cloud giant harp is wrought of fine golden wood, inset with brilliant jewels, and etched with intricate designs. The column of the harp is crafted to resemble the face of a regal cloud giantess face. The harp stands about 4 feet tall and makes for a wonderful handheld instrument for giants. Smaller folk are typically surprised that, despite its thick wood construction, the harp is as light as a feather. The harp emits beautiful angelic music when played, and in the case of sentient versions, the giant effigy even sings in glorious harmony along with the plucked strings.
You can play the harp as a standard action, but must succeed at either a DC 15 or a DC 20 Perform (string instruments) check for its magic to function. This check can be made once per day, whether or not it succeeds. When you succeed at a DC 15 Perform (string instruments) check, you play a soothing melody that puts up to 10 HD of humanoids within 30 feet of you to sleep (as per deep slumber) unless they succeed at DC 14 Will saves. You can affect up to 20 HD of giants with this harp, but you must succeed at a DC 20 Perform (string instruments) check to do so. If you fail to make a DC 20 check but succeed at a DC 15 check, you may still affect up to 10 HD of creatures.
Faint enchantment, CL 5th. Craft Wondrous Item, deep slumber, 2,430 gp, 194 XP, 5 days. Weight: - ; Price: 4,860 gp.
Variants: Sentient versions of cloud giant harps exist that are said to be elegant speakers and singers. Extremely fond of their original cloud giant creators, these harps consider giants the greatest of all beings and superior to those of lesser stature. These harps still obey most of their masters' commands but only after voicing their displeasure and embarrassment at being "used by such an inferior creature."
Source: Dragon #345