Ragna Crimson 15

In this action-packed dark fantasy, humanity lives under the threat of annihilation by immensely powerful dragons. The dragon hunter Ragna embarks on a revenge-fueled quest to eliminate that threat once and for all! To bolster humanity's forces, Ragna personally trains Ruoxi and the remnants of the Argentum Corps in the art of aura control. Deep underground, in a secret layer of Gehenna, Bagram plots the invasion of both human and dragon strongholds across the world. Before long, a swarm of twenty-two million dragons descends on Amen, setting off an all-out war between the Roaring Bloodline and the Solarian Church!