>>96253902
My marines, tyranids, and chaos marines are all duking it out on a planet officially named "63-7" and unofficially named "Rex Tempestus" that has inclement weather 100% of the year.

My marines are specialists of ground engagements in inclement weather.
My tyranids have hyper-adapted to planet
My chaos marines are protected from the storms by the powers of the dark gods.