The Shadow Saint by Hanrahan Gareth

The Gutter Miracle changed the landscape of Guerdon forever. Six months after it was conjured into being, the labyrinthine New City has become a haven for criminals and refugees.
Rumors have spread of a devastating new weapon buried beneath the streets – a weapon with the power to destroy a god. As Guerdon strives to remain neutral, two of the most powerful factions in the godswar send agents into the city to find it.
As tensions escalate and armies gather at the borders, how long will Guerdon be able to keep its enemies at bay?