Breeze of Ironclad: the Forgotten (Vol. 26)

Summary

In an underground labyrinth where time flows backward, a disgraced knight seeking redemption in the borderlands discovers a glowing parchment containing maps of stars that do not exist that could awaken a dormant magic capable of vaporizing entire cities. Pursued by a rogue celestial navigator who seeks to burn the stars, they must race against time before the iron gates of the underworld swing open.