Kjetil-Vidar Haraldstad (born June 28, 1973) is a Norwegian extreme drummer he is more well know by his stage name Frost. He chose this stage name, because he wanted to purify himself and become one with the darkness and the Frost of Black Metal. He currently plays for the black metal bands Satyricon and 1349. He is considered reputable for being one of the fastest and most proficient drummer alive, and a legend to Black Metal and to Norway art scene. 