Diabolical Masquerade was a Swedish one-man black metal band with progressive influences.

The band was formed in 1993 in Stockholm as side project of Anders Nyström (aka Blakkheim), known for his work as the guitarist of Katatonia.

This album is conceived as the soundtrack to a nonexistent Swedish horror movie, with 61 tracks broken up into 20 movements, each with a unique feel and theme.

[2] Death's Design includes many passages featuring various genres and styles, experimenting with progressive rock, progressive metal, ambient, classical music, and rhythmic percussion-based passages.

In early September 2004, Nyström announced that he had put the project to rest, after not having found the necessary inspiration while working on a fifth album.