GP: What new features will this expansion offer gamers familiar with the NWN franchise?

The most significant addition in Hordes of the Underdark is the ability to take your character from NWN or Shadows of Undrentide above level 20, in accordance with the D&D Epic-Level rules. Other than that, we have loads of new spells and feats, a bunch of new skills, 6 great new prestige classes, the ability to have two henchmen, and lots more. It’s a really feature-rich expansion.