Talion

Justices – the select of the Talion, endowed with fearsome magick and lethal martial skills – roam the Shattered Empire, crushing the lawless and championing the oppressed. Their word is law and their judgment binding on highborn and low.
Nolan is a Justice born in what once was the free nation of Sinjaria. Orphaned in the war of conquest with the nation of Hamis, he traveled to far Talianna and secured the right to become a Justice. Now, years later, the Master of all Talions has a dangerous assignment for Nolan: he is to guard the life of the king who destroyed Sinjaria and slaughtered his family. Alone, Nolan ventures into the political maelstrom that is the court of Hamis to stop an assassin even his Masters think cannot be slain . . .
(from the back cover)