Zatanna is a powerful sorceress whose abilities are apparently genetic. As a tribute to her father and as a focal point, she usually casts spells by speaking verbal commands backwards. She has also proven capable on many occasions of casting spells by speaking normally, and, in rarer occasions, the ability to use magic for simple tasks without speaking.
I've admitted to liking Twilight, it's my shameful-not-so-secret, but this is going to new heights. And I do mean that quite literally. LOOK HOW HIGH HIS HAIR IS STICKING UP! What's sad is they're not far off, it's probably like, to scale or something.