What makes Slave of Satan by Reverend Bizarre notable?

'Slave of Satan' received significant attention within the doom metal genre, showcasing a 20-minute title track that pushed the boundaries of traditional song structure. The album has been noted for its influence on subsequent doom metal bands, helping to popularize lengthy compositions and thematic depth within the genre. Released in 2005, 'Slave of Satan' is Reverend Bizarre's follow-up to their critically acclaimed debut 'In the Rectory of the Bizarre Reverend'. At this point in their career, the band was solidifying their presence in the doom metal scene, known for their epic compositions and esoteric themes. This album further entrenched them as prominent figures within the underground metal community.