Spirit of Boreas

Spirit of Boreas (スピリット・オブ・ボレアス) is a wind spirit-based Creation Magic spell.

Description
After absorbing an elemental spirit, the user shapes a halberd out of condensed wind. It releases streams of wind that are capable of shattering and disintegrating devil-reinforced Bone Magic, as well as drilling into a target.

Trivia

 * Boreas is one of the wind gods from Greek mythology and commands the north wind.