Because whatever dream world this is, it is not in the slightest bit creative. The wider threats seem to be A) The Burning Legion, which is demons, all kinds. B) The Scourge, which was created by the leaders of the former group, and consists of undead and horrific looking spider creatures. And in some cases C) Old Gods, but they don't exactly invade the same way I don't think, or D) The Horde, which we've already seen seems to consist of Orcs.
It's ridiculous, really. Most of them even arrive from the same portal, which one would think someone would have had the decency to blow up by now.
Team JNPR and Team RWBY seem to end up tangled up together quite often, so I consider you to be another team mate in some ways. The rest of you too, of course. Even Jaune. Now that he has, thankfully, stopped trying to get me to date him. So I am definitely glad to help.