Ossaert is a relatively enigmatic presence within the black metal scene, emerging as a one-man band from the Netherlands with a penchant for blending atmosphere with aggression. The musician behind Ossaert remains anonymous, preferring to let the music speak for itself, and it does so with an unyielding, haunting voice. The project's sound is characterized by its raw, melodic sensibilities, layered with a traditional black metal aesthetic that pays homage to the genre's cold and grim atmospheres. Ossaert's lyrical themes often delve into the realms of existential dread, spiritual despair, and a pervasive sense of darkness that is both personal and universal.

Since its inception, Ossaert has been prolific in its crafting of unsettling and immersive compositions. The releases, from "Offerdier" to "Bedehuis," demonstrate a consistent evolution in both sound and thematic complexity. "Pelgrimsoord," the project's full-length album released in 2021, has been particularly noted for its ambition and the depth of its dark storytelling, cementing Ossaert's place as a compelling and mysterious force within the black metal community. With each subsequent release, including "De Lichtkrans en de Waan" and "De Nacht en de Verdwijning," Ossaert continues to solidify a reputation for producing music that is both sophisticated and suffused with an inescapable air of the occult.