You can, and some people do. Don´t know , if there are risks for you, never heard of them.
If you only want to try decks, you´d better go to the trainer,
www.elementsthegame.com/trainer. You can try all decks you can imagine against all AIs. PvP is, of course, not possible , there.
To get cards takes enough time and only a few people have all upgraded cards. With 2 accounts, your success is halved.
