I'm writing a book in which one of the major events is a day that separates two major forces in the world.
It's meant to be a punishment from a high power, so at first I wanted to call it The Day of Punishment, but honestly that sounds like I put a minimum of effort into it and it just doesn't sound good.
I looked up a few words in a thesaurus and found sunder. So I thought of using The Day of Sundering, but I'm not quite sure if it makes grammatical sense, and whether it's the best choice available.
So in short, did I use the word sundering correctly? Or is there a better choice out there that I'm not thinking of?