Cordelia
Like Loki used to say, anyone can cause an Apocalypse. Only five four of Her creations can create the Apocalypse. But I'd like to think She'd warn us before a thing like that. You mortals just get to deal with whatever she feels like shelling out.
If you're lucky, you might get another flood. I think one or two mortals not related to Noah actually survived that one. Know how to tread water?
No problem. Can't say I'm hoping you stop it though. First off, it's going to be a thing of beauty. Second, it's the easiest way home I've been offered in a fucking millennium.
You hear any Run DMC in those visions of yours and you let me know.