Ruehar's Flute

This finely crafted silver flute resembles a rolled-up spell scroll, with its holes lining the edge of the "parchment." It has seldom been seen outside the possession of the descendants of Ruehar, a green elf wizard who lived during the days of Myth Drannor.
When two short notes in any key are played on the flute, it emanates light, as the spell, and automatically dispels any of the following effects within the light effect's radius: acidfog, cloudkill, fog cloud, obscuring mist, solid fog, and stinking cloud.
The flute's second ability is activated by a command word known only to Ruehar's descendants. When this word is spoken, the flute unrolls like a scroll; revealing a small spellbook capable of holding twenty spell levels. The original Ruehar's flute contains the following spells: 1st - color spray, magic missile, Tenser's floating disk, ventriloquism; 2nd - daze monster, glitterdust, lively step; 3rd - Leomund's tiny hut, phantom steed; 4th - polymorph. Ruehar's descendants may, however, have manufactured more flutes since his death, and those spellbooks may contain different spells or simply remain blank. Any wizard who has deciphered the spellbook within Ruehar's flute may study and prepare these spells normally.
Faint transmutation; CL 3rd; Craft Wondrous Item, gust of wind, light; Price 13,000 gp.
Source: Player's Guide to Faerûn