Southern California's Seven Sisters Of Sleep (SSOS) formed in mid-2009 from members of Tafkata and The Arm And Sword Of A Bastard God. However, SSOS members have been playing in bands or on shows together for 15 years. Their first self-titled full length LP was released in the very beginning of 2011 on Baltimore's A389 Records (CD on Southern Lord), and the band has been refining its sound ever since. SSOS have released 2 full-length LPs, a split LP with Children Of God, a self titled 7" EP/CD, and a split 7" EP with Ilsa on A389. A European 10" EP split with Shaman's Owl was released on Feast Of Tentacles, and a very limited interlocking groove 7" EP via longtime friends Vedavu Records rounded out the band's current discography.

Mixing components of doom, death metal, black metal, d-beat, grind, etc, SSOS are not content with fitting into one genre or subgenre. In general, SSOS write music that encompasses all the forms of heavy music that have influenced them over the years. The band also completed a full US tour in 2013 and an east coast tour in 2014, culminating in the band's first MDF appearance.

Seven Sisters Of Sleep then signed to renowned independent label Relapse Records in 2015 for their upcoming third full-length album Ezekiel's Hags, which is far and away the band's most ambitious and meticulously-crafted material to date. Ezekiel's Hags is a venomous mixture of doom, death metal, black metal, d-beat and grind. Recorded with engineer Paul Miner (Motörhead, Phobia, Terror), Ezekiel's Hags is 11 relentless songs that beat the listener into oblivion. Chock full of tortured vocals, gigantic riffs, and thunderous drums, this is music as vile as it can be.