Hey I was wondering if someone did a ultra nightmare run would it be a new category since ultra nightmare enemy do more damage in ultra nightmare but U get a faster recovery

Most of us are generally of the consensus that there's no reason to add a new category if ONLY one person runs it (100% being the exception as it went alongside Any% as a standard category created). There's already been 2 categories with a run that has no board yet because only one person ran it in full (Wasteland Legends and The Scorchers).

If there comes a time where more people are actively running it outside of the main categories there's always room for discussion to add a board for it, as we have for those other 2.