As Blood Runs Black is an American deathcore band from Los Angeles, California formed in 2003. The band was formed from a band called Broken Stems by vocalists Louie Ruvalcaba and Enrique "Ricky" Martin, Bassist Richard Reyes, and guitarists Bjorn Roybal and Kyle Hasenstab, with the drummer, Brian "Animal" Matute leaving and being replaced by Hector "Lech" De Santiago. Before releasing their highly-acclaimed debut album, Allegiance, they released 3 demos, with the first demo featuring Hester Prynne and In Dying Days. It also had a hidden rap song after a few minutes of silence on the track Before The Break Of Dawn. The second demo featured the same 2 songs that'd be featured on Allegiance amongst others, and the final demo had demos of popular songs like My Fears Have Turned Into Phobia and Strife (Chug Chug). They were then signed to Mediaskare Records on which they released their highly-acclaimed debut album, Allegiance on June 6, 2006. Their album along with extensive touring in the United States brought considerable success making the band a well-known act.

During 2007's The Summer Slaughter Tour, drummer Lech was kicked out the band due to personal differences with the other members. He was replaced with Ryan Thomas from the band The Serpent Son. This event led to some serious online bashing from fans, as Lech was their only remaining founding member who in fact recruited the other members of the Allegiance lineup, and wrote much of Allegiance's material beforehand. This also brought dismay to the fans as Allegiance was mostly noted by Lech's unique and extremely technical drumming style.

In 2008, vocalist (Chris) and guitarist (Sal) left the band to settle down and after their departure Lech was recruited back into the band. Later In 2009, lead guitarist (Ernie) decides to leave the band to settle down and pursue school. In 2010, Lech recruited Greg Kirkpatrick (Gift of Prophecy), Daniel Sugarman (Fallen Figure) and Sonik Garcia (Fallen Figure).

Their second album entitled "Instinct" was released March 15th, 2011, with. single titled Visions being released on 2014 that would later reappear on their final album, Ground Zero. The bands breakup was announced on August 12th, 2014 by Lech, saying that the bad would play one final tour to support the album. In August of 2021, however, the band released a preview video showcasing new music the band has been working on. Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.