Fifty Shades of Thay

Heroes of Darkness

From the introduction:

In the north lay the desolation that was once Netheril, and ever-growing magocracy of Thay. Most people think of them as looming shadows of everlasting evil. However, dark magic practitioners across the globe envy these international superpowers for their malefic innovations. Now their secrets are yours! Within this article you will find races, feats, and spells that all benefit from intimate knowledge of the renewed Shadow Weave.