And just like that, t_e_celena_bless works... despite the fact it appears nowhere in any of the files.
{"code" : "has_status","status" : "t_e_celena_bless","check" : true} still doesn't work as a showupreqs or a reqs. And no, I've used no load tables, the entire mod is one class file.
Now the game throws errors because there's no condition to write "requires a temporary buff" in a class requirement list, but that's pretty harmless.