Mats Leven is a singer, songwriter and producer. Some of his most notable collaborations have been with guitar legend Yngwie Malmsteen, symphonic metallers Therion and doom metallers Candlemass. In 2011, due to family issues on the part of Firewind's lead singer Apollo, Mats was called in to substitute for the rest of their European tour. Mats also started touring with Trans-Siberian Orchestra in 2016. In 2019 Mats releases his first solo album under the name Skyblood.