As anyone who attended their show back home in Sweden last weekend knows, Ghost unveiled a new song by ceremoniously offing their singer (Papa Emeritus) and introducing his high note-hitting successor, Papa Emeritus II. The frontman can be heard leading his undead hordes on Infestissumam, an album that’s due out next spring through Loma Vista Recordings. Check out its first single (“Secular Haze”) and some official live footage below, along with the record’s tracklisting…