UMUR "Mordirivial Disemanation" is the third demo recording by US, Florida death/thrash metal act Hellwitch. The demo was independently released in June 1987. It´s the successor to the January 1986 "Transgressive Sentience" demo and features the same trio lineup who recorded that demo. "Mordirivial Disemanation" features four tracks and a total playing time of 12:31 minutes. Most of the material from the demo was re-recorded and included on Hellwitch´s debut full-length studio album "Syzygial Miscreancy" (Wild Rags Records, December 1990). "Nosferatu" which was included on both previously released demos is also included here.

Stylistically Hellwitch have matured and especially Patrick Ranieri´s vocal style have become more extreme, unique, and distinct sounding (aggressive and often using high register screams). The music has become increasingly more techncial since the first demo, and "Mordirivial Disemanation" is yet another more technical death/thrash metal release. By this point Hellwitch are close to sounding like they do on "Syzygial Miscreancy". So it´s a bit of a wonder that Hellwitch weren´t able to get a record contract until three years later. By then both bassist Andy Adcock and drummer Dave Silverthrash had jumped ship, and Ranieri had assembled a whole new lineup for the project.

"Mordirivial Disemanation" is packed in a brutal, raw, and sharp sounding production job, which perfectly compliments the highly energetic, savage, and verging on chaotic sounding death/thrash metal sound of Hellwitch. A 3 - 3.5 star (65%) rating is warranted.