GroteSK is a Norwegian black metal band formed in 2000. They are known for their raw, aggressive sound and their use of traditional Norwegian folk instruments. The band has released four full-length albums, including "Blv (Kvelertak)" and "Kvelertak 2024." GroteSK has toured extensively throughout Europe and North America, and they have shared the stage with bands such as Mayhem, Darkthrone, and Satyricon.