Lightning Battle Fiend

Lightning Ultimate Magic: Lightning Battle Fiend (雷究極魔法『雷霆刹那戦鬼』) is Luck Voltia's lightning-based Ultimate Magic spell.

Description
After borrowing a large amount of natural mana, Luck covers his whole body in Lightning Magic, with thigh-high boots and clawed hands. He grows two horns from his head, two lightning-shaped protrusions from his shoulder blades, and a lightning-shaped tail from his lower back. His pupils become vertical slits, and two lightning bolt markings appear on his cheeks, resembling the tattoos from Lufulu's possession. Eight balls of lightning float in a circle behind his back.

In this form, Luck moves at lightning-quick speeds, and his kicks and strikes are strong enough to cleanly sever limbs, necks, and torsos of mid-ranked devils.