[@Sypherkhode822]
Ok, could you tell me more about this mysterious entity? Why does your character have a connection to it?

Fog as a technique is fine. It would have to be drawn from the Void, however. Your character creates an anomaly that allows this fog to seep through into the real world. So, there would be no control of it, just the ability to have it appear in an area. Is that alright with you?