Elseerian: The Second Draeken War #1 (The Chronicles of Lumineia: The Second Draeken War series)

The assassination of heroes was once a warning . . . for an invasion that nearly destroyed the world. Nations were slaughtered, cities were erased from existence, and defending armies were crushed into oblivion. With hundreds of thousands dead the races stood on the verge of extinction.

But the end did not come.

Instead the black horde vanished, leaving terrified survivors in its wake. As the centuries passed the holocaust faded into myth and legend. With the tale forgotten the renewed signs go unheeded. Only a supreme warrior can stave off the inevitable, a warrior named Elseerian.

For the killings have already begun . . .