The Dragon Feeder's Ascension

Overworked office worker Alex dies from sudden burnout after being forced to work overtime and is reincarnated in the magical continent of Diamont. He awakens in the body of a powerless orphan, mocked as a useless "dragon feeder" and relentlessly bullied at the Magic Academy. By chance, he awakens an ancient crystal and becomes the only mage in the world capable of wielding all six elements. As he tames ancient dragons, claims powerful artifacts, and annihilates demon armies, the once-worthless orphan rises step by step to become supreme commander of the allied forces of the six nations.