Grim was the name of Thomas Eversole’s one-man black metal project that put out a record way back in 1999 called Scepter of Blood. Eversole has been in and out of music since then, but recently felt the urge to combine black metal with Gregorian chant. The result is a haunting, post-black, ambient piece appropriate for your metal worship time.
The choir, performing Sergei Rachmaninoff’s Vespers, comes out sounding like the wind in a black metal storm. It’s very different, but worth a listen.