No these can't be used in tournaments, but they are still badass official Magic: The Gathering cards. I'd love to have the Sword of Dungeons and Dragons and think about the fun Commander decks that could be built around Grimlock!
I am not a Brony. I've never watched My Little Pony. That being said I have no issues with folks that are (as long as your not making creepy sexual fan art that's easy for kids to stumble upon). I just really like bright pretty colors and black. I made a recent comment to friends that I'm a goth unicorn.
You can see more exclusives (including a Transformers toy that can actually charge your phone) here.