Actual aliens won't appear...yet, but think of it like alien tech. The same applies for magical based abilities. There won't be any serious magical deities or creatures....yet, but the students who are aligned with that side will be using magical artifacts, have magically infused abilities, or their abillities were brough out by magic. For the most part though I'd rather not dwell too much on both sides and would prefer if we keep it pretty simple and just say that our characters are metahumans with superpowers.