A Promise of Vengeance — Giacomo Giammatteo

The seven worlds of Neltsar are in turmoil. War has devastated the largest cities and killed millions of people. Now, one hundred of the strongest warriors -- beings with incomprehensible power -- have been banished to the Forsaken Lands. After wandering for one thousand years, they emerge onto a planet similar to medieval earth where no one has powers -- or do they? 

A Promise of Vengeance is the first of four books in the Rules of Vengeance series. Read it now and be hooked.