Mashle: Magic and Muscles, Vol. 15 (manga)

Orter, Rayne, and the others join forces to try and take down Innocent Zero’s eldest son, Doom. But Doom overwhelms them all, and according to him, he’s still holding back. With Doom unaffected by their attacks, the situation seems desperate. That is, until their ace in the hole arrives. Will humanity’s greatest creation be the light it needs in its darkest hour?