Yesterday, this was an ordinary twenty-first century city. Today it's a war zone, tomorrow it'll be walled off and abandoned.

A few collapsed buildings, shattered streets, and assorted craters. The place is mostly empty, with scattered groups of mostly humanoid monsters roaming and trying to escape the guarded fence around the city. The most instantly noticeable change is an ongoing wordless singing in the back of the mind of anyone present. By itself it's just a sound. An unpleasant sound, and almost but not quite predictable as if someone were trying to attack the listener's sanity without saying anything, but possible to ignore. But along with it, any time a listener closes their eyes they get flashes of memories. Not their worst memories, but whatever negative ones can stick with them unforgettably. It builds up associations between the feelings in those images and almost anything else. Sometimes there's a recognizable common thread and other times there isn't.

An angel fights off teams of opponents. She's fifteen feet tall, extremely winged, with more wings than is strictly necessary for an angel. Even some of her wings have wings. All of them are asymmetric and varyingly sized. A spherical halo of weaponry surrounds her, firing at her more distant enemies from across the battlefield. Her opponents cycle in and out: a golden man, a man surrounded by a bubble, a woman in a dark costume, all flying. Others make certain to stay away after taking their turn, on rare occasions spending too long hearing the angel's music. Those ones voluntarily self-destruct.

A small group of ordinary humans takes refuge in a house as far from the battle as they can reach. The song is quieter here, and, they hope, less potent. Some of them run away from and back to the house, occasionally calling for help. They haven't found any.