Hip-hop legends the Wu-Tang Clan are set to release just one copy of a new collector's album, titled Once Upon A Time In Shaolin.

The 31-track Cd, which took five years to record, will be presented in "a hand carved nickel-silver box" designed by British-Moroccan artist Yahya, and will be displayed at art exhibitions around the world.

Following the tour, the album will go on sale.

Wu-Tang Clan star RZA tells Forbes.com, "We're about to sell an album like nobody else sold it before. We're about to put out a piece of art like nobody else has done in the history of (modern) music. We're making a single-sale collector's item. This is like somebody having the sceptre of an Egyptian king."

Bandmate Jamiel 'Masta Killa' Arief adds, "I think it's a musical portrait that's going to revolutionise music in the future..."

The compilation features all new music from the group and guest appearances from Redman, Bonnie Jo Mason and others.

The group is also planning to release a 20th anniversary album, which is scheduled to hit stores this summer (14).