Ragnarok
I’m not sure how I missed the Ken Hite-scribed setting coming from Atomic Overmind Press, in which the Nazis summoned Jormungandr, only to see it nuked by the United States, which led to disastrous physical and occult effects including monsters, not to mention Soviet giants and a generally battered world. But I did. So there it is in case you did too.
Originally published at Imaginary Vestibule.