The Sacred Blacksmith Vol. 8 (manga)

Trapped underneath Blair Volcano, Luke and Ewain find themselves inside an icy cavern where a mysterious sword stands firmly planted into the ground---until an earthquake dislodges the blade, hastening the breaking of Valbanill's seal and the legendary Inhuman's awakening. A replacement blade must placed in its stead immediately, for Valbanill has already begun to stir...

The pair is saved by a rescue party led by Cecily, and Luke must make a choice: to either allow Cecily to become the Sacred Blade's Sheath and suffer the fate of her grandfather, or to forge a true, durable Demon Katana at great personal cost to both Lisa and Luke. Will Luke find the strength and courage to save the women he loves, as he stands once more before the Inhuman Valbanill?