Magnus "Devo" Andersson is a Swedish musician and producer. He is most well known for his work with famed black metal group Marduk. From 1992, he played the guitar for the band until he departed in 1994. However, in 2004, he returned as the bassist for the group. Between that time, he joined melodic death/black metal band Cardinal Sin in 1995, which is currently on hold. He also started a gothic/death metal solo project back in 1986 Overflash. Other acts he played in include Allegiance, Dear Mutant, and Pain.

As a musical producer, he founded the Endarker Studio in 1998 in Norrköping, Sweden, and is the studio's current owner. There, he has produced, mixed, mastered, recorded, and engineered for multiple bands, including Marduk, Dodsfall, and SubRosa.