Board Thread:General Discussion/@comment-25145866-20140816065806/@comment-25273047-20140816162940

'Dragons' should definitely be lower case, Vikings shouldn't though because 'Vikings' is the proper name of them, 'dragons' however, is simply a basic noun. If we are talking about naming a species of dragon such as the 'Monstrous Nightmare' then yes, capitals are necessary due to it being a proper name.

Unless, of course, 'dragons' is at the start of a sentence. :P