I was looking up some information about cases online and it seemed that a lot of them showed up in this language Erzya. I didn't realize at the time that it was a Finno-Ugric language. Needlesstosay, I became interested, unfortunately, it's difficult to find any resources for it. I don't mind reading through russian books if I have to as some are laid out in such a way that it's easy to find what you're looking for even if you don't know any Russian. I have searched through uz and have found one resource, but have not figured out how to download the thing off the filehosting site in russian.
Anyway, if you know of any good resources, that would be neat. At the very least, I'd like to find out a bit about its grammar.