UMUR "A Tomb of Sanity" is the first demo recording by Finnish death metal act Prephrophecy. The demo was independently released in June 1992. Preprophecy formed in 1992 and released three demos under that monicker before changing their name to Ravenfall in 1996, and again to Cryhavoc in 1998.

The material on "A Tomb of Sanity" is in the more brutal end of the old school death metal scale with deep growling vocals, brutal riffs, and both heavy and fast-paced beats. I´d say they are predominantly influenced by the US scene (an act like Deicide comes to mind), but still with that gloomy and morbid Finnish twist that many artists from Finland have. Unlike many contemporary Finnish artists Preprophecy don´t use leads to enhance atmosphere, but instead lets the brutality and dark nature of their songs speak for themselves.

"A Tomb of Sanity" features a decent sounding production job all things considered. It´s of course audible that this is not a professional sound production, but the sound still suits the rawness of the music. Keeping in mind that "A Tomb of Sanity" is a debut demo Preprophecy have produced a decent quality release with only a few flaws (they should not have incorporated the acoustic guitar part on "Depth of Delight", as it sounds amaturish) and a 2.5 - 3 star (55%) rating is warranted.