The lights flicker for a second, then you loud screeching coming from the horizon. It gets louder as the entity rushes towards you. It constantly says: "GIVE ME THE EXPANDABLE. GIVE ME THE EXPANDABLE. GIVE ME THE EXPANDABLE. GIVE ME THE EXPANDABLE." Pandemonium also get bigger the more mass it collects/kills, similar to how a black hole behaves. You need to hide before it kills you.