During their set at the Gefle Metal Festival in Gävle, Sweden yesterday (July 16), Candlemass were joined onstage by Ghost’s Papa Emeritus III. Check out some footage of them performing “Well Of Souls” below: View this post on Instagram A post shared by Gefle Metal Festival (@geflemetalfestival) https://twitter.com/RocknStuffMX/status/754412685450555392