A circular arena called "Ember Pit" in a volcanic setting, built for a dark, dangerous battle. The cracked black floor has glowing lava veins. Surrounding it are lava tunnels with flowing molten lava, casting orange-red light and smoke. Inside are cult shrines made of dark stone with ancient carvings, fire torches, bones, broken chains, and braziers. A raised rocky platform with jagged stone and rusted metal scaffolding surrounds the arena for cheering spectators. Primitive benches and rails mark the viewing area. The sky is smoky, with ash falling. Lava light creates deep shadows, giving the place a ritualistic, demonic, post-apocalyptic feel.