Cult of Luna are a Swedish atmospheric sludge/doom metal band formed in 1998 in Umeå, Sweden by guitarist Johannes Persson and vocalist Klas Rydberg. They had new ideas on how to explore and develop their music. After some member hunting and rehearsals CoL had its first line-up consisting of: Klas Rydberg, Johannes Persson, Magnus Lindberg, Erik Olofsson and Fredrik Renstrom. After a short period of time, Fredrik had to leave due to some personal difficulties.