Revocation is a Thrash/Death Metal band from Boston, MA, formed in 2006 from Cryptic Warning. They combine the power and aggression of the old-school thrash metal style with the twisted musicianship of technical death metal. After 2 demos, they released their first full-length album, "Sanity's Abberation". A unique display of technical prowess and ferocious energy which came out in 2005. They released an EP the following year entitled "Summon the Spawn" which was followed by their next full-length, "Empire of the Obscene" in 2008 by Relapse Records.