While every class is getting new talents and spells in Wrath, there are three big, brand-new additions to the game: Death Knights, Northrend, and the new profession: Inscription. We've known for a little while that the general gist of Inscription would be to add effects to spells you already have, like a knockback to your fireball - basically enchantments for your skills.
Now that the beta has gone up, we have a few actual examples of inscriptions and what they might need, though so far we still aren't seeing any inscriptions that add to spell effects. Inscriptions evidently require various kinds of ink, which will be made from herbs by a skill called Milling, which destroys five herbs to create ink (very like jewelcrafting's Prospecting). Parchment will also be required to create scrolls, although the items it's made from are not yet implemented. And what could this Mysterious Tarot be? Maybe just a high-level parchment, given that it requires the same reagents, only more of them? There's another skill called Decipher that "allows the deciphering of tomes, books, and scrolls," though what that might mean I"m not entirely sure.