Black Rivers Flow is the second album by American heavy metal band Lazarus A.D.[1] Critical reception was positive towards the album, usually rating it as similarly or just below 2007's The Onslaught.

AllMusic noted the band's change of genre from retro-thrash to groove metal, but praised it as an equally effective blend of music.

While a lack of originality is suggested, the catchiness and slowed down riffs are both praised.

[2] Blabbermouth.net praised their change in style as making every song stand out without any evident weakness, particularly commenting on their "bigger hooks and every ounce of the aggression".

was appreciative of the new style, suggesting hints of Metallica, Pantera, Death Angel and Ozzy Osbourne, making the "album ride a strangely attractive line between sounding entirely new yet being eerily familiar and aged".