Daniel M. Bensen & Simon Roy 
First Knife [PDF ebook] 

From SIMON ROY (PROPHET), Sideways Award-winning author DANIEL M. BENSEN (Junction), ARTYOM TRAKHANOV (UNDERTOW), JASON WORDIE (GOD COUNTRY), and HASSAN OTSMANE-ELHAOU (Red Sonja) comes a sci-fi adventure equal parts Conan the Barbarian, Nausicaa, and Zardoz. In the hot ruins of far-future North America, a slave stumbles across an ancient and bloody power. A conqueror bargains with godlike beings. A soldier tries to bring back his lost world. As the full moon approaches, the remaining humans of Earth find themselves standing between the forces that once nearly destroyed it. Collects First Knife #1-5