The Sentinel's March

A fully-collapsed Imperium hall down the slope from the seat where a severed Vallen Sentinel still walks an endless patrol with no destination through roofless arcades — open-air, deadly, and you can hear its bronze tread across the field before you see it.

The Sentinel cannot stop. Whatever command the Sundering severed — stop, stand down, release — was not one of them. It walks the old patrol-route through walls that are no longer walls, over rubble it does not step around, in a loop it completes every few hours. Sister Velthi wants it ended. The College's diggers would pay double to bring it back intact and learn how the Imperium first woke its bronze.