Gamespot is running a promotion. Basically enter your email address and get a code.
You'll get a casting companion plus some enchantments, refining stones, injury kit and healing potions.
Go to Neverwinter - Mystagogue Companion Code Giveaway - GameSpot and follow the prompts.
It says you need the ARC client installed. But you do not.
Simply go to https://my.perfectworld.com/nw/redeemkey and redeem the key you get there.
I did the above method myself. And it works. So yeah.
See below for an image (after Hekson's reply).