Sinnara
Sinnarra appears in cultures that place more value on the future rather than developing themselves in the present, known as Subijinan cultures. This includes his/her favorite past time: procreating. She has a little something for everyone, and only has one thing on her mind, just like the culture that manifests her. She can bear the child of any man or woman, or give one to anyone that wants one. Her children, who have equal appetites, eventually overrun the culture that spawned them. They can look like anything and usually take the form of some manner of fetish represented in that civilization, monstrous or not. Over time, these monsters can develop their own races, cultures or armies. If provoked, they will even go to war against the humans they desire. Eventually, even the humans that refuse her die out or give in, and the humans and monsters alike vanish from the earth, leaving cities that are as literally empty as they once were figuratively.

I have quite a few “gods” in my setting but everyone always wants to know about this one, for obvious reasons. The narrative point of Subjijina and its servant, Sinnarra, is that living without any purpose other than to raise children, or to prepare for eventual futures, carries the danger of leaving a barren culture that exists for no point. Physical bodies may be what fills the cities, but art, science, history, and all those good things are what fills the bodies. If the bodies are empty, Sinnarra shows up to fill them. Then even those fade away.