From publisher blurb:
In the deepest Pit of Hell, a new force rises. Given motive by a Lesser Infernal Lord, the Hellfire Hive has been created? Its task? None other than the defeat of all the Abyss, but often, this path leads right through the material plane and starts with the subjugation of all Mortal Life.
Get this book today, to learn more about this new Formian Hive! The Hellfire Hive presents new challenges for your players, and a way to make a trully alien intelligence into an undeniable force for Evil!