During the night of April 5, 2013, and the morning of April 6, 2013, bassist Slawek "Mortifier" Arkhangelsky died in his sleep while on tour near Munchberg, Germany. His band members discovered him "lifeless" and called an ambulance, which unsuccessfully attempted to revive him. An autopsy revealed that the cause of death was cardiac arrhythmia. They released their ninth full-length album Crusade: Zero on January 30, 2015 through Napalm Records. The album was recorded at Efektura Studio in Warsaw, Poland and was dedicated to Mortifer.
