Nocturnal Academy 13 - When Gods Collide - Nocturnal Academy, #13

Necronis the Unmaker is now only days away from tearing open the Wall of Fire. The hordes of imps and demons surrounding the breach are glorying in his imminent arrival. But the mysterious newcomer to the Nocturnal Academy, the eccentric Rhys Kelly, has an insane plan to close the breach that he believes just might work. It will require the school's most powerful mages and fighters to join forces with Appleton's priests and shamans.
The timely arrival of the Nocturnal University provides more help in the form of Lord Eldritch, Dr Ashe, Dr Primus, Malcolm and Kim. However, even with such a diverse group of multi-talented people, they will still be facing off against a truly formidable opponent. The Dark God has millions of monsters at his beck and call, ranging from the tiniest imps and larger demons, to massive lords, devoted Necronites and even his own chosen son.
Necronis is hell-bent on claiming the universe that he believes rightfully belongs to him, and will do anything to thwart his foes. To succeed Rhys and his small army will require nothing short of a miracle, and help from an extremely unexpected quarter.