Storm to Victory by Tara Grayce

A warrior of the magic of the ancient kings doesn’t just fight wars; he ends them.

Fieran has fought the Mongavarian Empire from the northern seas of Kostaria to the skies over Escarland. Now he will take the fight to the very heart of Mongavaria to end this once and for all.
When he’s sent on a dangerous mission, he and Pip will be tested as they have never been tested before. If they succeed, they can end the war. If they don’t, they will never see each other again.
The war has honed Fieran to a warrior worthy of the name and legacy of Laesornysh. It’s time for him to do what a Laesornysh does best.
End the war.
Storm to Victory is book 5 in the War of the Alliance series, a humorous steampunk fantasy series filled with magical gadgets, elven warriors, and a hint of no-spice romance.