Genre mixing works pretty well these days. In almost any case you can mix two genres of metal and make it sound well. Except for Straight Line Stitch, they screw it up terribly. Mixing some genres are fairly easy. Black Metal and Death Metal fuse together pretty well and Book Of Black Earth give us a a tasty helping of it with their October 14th release, Horoskopus on Prosthetic Records.

Prosthetic Records press Release:

WATAIN taps WITHERED, BOOK OF BLACK EARTH for Black Metal Magic Tour this fall
Prosthetic Records labelmates WITHERED and BOOK OF BLACK EARTH are proud to announce their involvement in the upcoming Black Metal Magic Tour later this fall supporting Swedish black metal titans Watain. The tour, sponsored by Metal Maniacs and BeyondTheDarkHorizon.com, will begin in Northeastern Canada in early October, head to the West Coast, then wrap up in early November in Pennsylvania.