Self Spiller is led by Agalloch bassist Jason Walton who hand-picked fourteen people to make their mark on this monster of a record. All contributing musicians composed and overdubbed their individual parts from across the world - Portland, OR to Tokyo to Oslo to Canada. Much of the music was composed without the musicians hearing the entire piece or knowing what other members were adding. Chance played a fundamental role in the stitching together of Worms In The Keys. In the end, Walton sifted through dozens of hours of recordings, layered hundreds of tracks, and edited countless performances spanning six years finally resulting in Self Spiller's debut album.

Worms In The Keys has been described as a marriage of Mr. Bungle's California and Arcturus' genre defying La Masquerade Infernale.