Sumac Is An American Sludge Metal Band Consisting Of Aaron Turner Isis Old Man Gloom Etc. Nick Yacyshyn Baptists Hard Feelings & Genghis Tron And Brian Cook Botch Russian Circles . The Band's Debut Record The Deal Was Released In 2015 On Profound Lore. Their Second Album What One Becomes Was Released In 2016 On Thrill Jockey.