God of Night: Book Four of The God Fragments

The time for heroes has come, but all the Riven Kingdom has is bastards.
With war between the Militant Orders looming, the entire continent may soon be on fire. The very nature of magic has changed and the horrors of the deepest black are rising, but an even greater danger threatens to eclipse it all. Turning the tide of history may require a gamble only a bunch of drunken lunatics are willing to take.
The old ways need breaking and that's one thing the Cards are good at. Just be careful what you wish for.