Signal Boost: SevenFold Sword by Jonathan Moeller

The quest of the Seven Swords has put terrible power in the hands of madmen.

The Necromancer of Trojas wields the Sword of Death, and with it he has summoned a vast host of the undead. Unless Ridmark Arban can stop him, the undead horde will conquer all the realm of Owyllain.

But the city of Trojas holds other secrets.

And one of those secrets might kill Ridmark and destroy Owyllain…