Eraser vs Yöjalka (aka EvsY) are Julius Lehmuskallio (Eraser) and Simo Ojala (Yöjalka). They started making music together in 2000. Their first EP "Eraser vs Yöjalka" was released in 2001 by Exogenic Records. They have released two full-length albums on Exogenic Records and two albums on Faerie Dragon Records. The latest album was released on Ektoplazm.