Sumac (stylized as SUMAC) is an American/Canadian post-metal band that formed in 2014.It features the Vancouver, British Columbia-based Nick Yacyshyn (Baptists), Brooklyn, NYC-based Brian Cook (Russian Circles, ex-These Arms Are Snakes, ex-Botch) and Vashon, Washington-based Aaron Turner (Mamiffer, Old Man Gloom, ex-Isis).Sumac released its debut album The Deal through Profound Lore Records in 2015.