OS, a mysterious Hungarian band belonging to the Bone Chapel Collective, is set to release their second full-length album, Tehom, with IRON BONEHEAD. The album features a thick and scuzzy guitar tone, haunting ritualism, and a crashing wave of disgusting, dingy riff-crunge. Despite their primitive sound, OS is exclusively driven by death energies and incorporates subtle supernatural elements. Tehom is a simple yet sublime feast for fans of bestial metal and Naked Whipping deathgrind. The album will be available in limited CD and vinyl formats.