Spirit of Zephyr

Wind Spirit Creation Magic: Spirit of Zephyr (風精霊創成魔法『スピリット・オフ・ゼファー』) is a wind spirit-based Creation Magic spell.

Description
After absorbing an elemental spirit, the user condenses external mana into a large, two-handed sword. Since it is partially composed of external mana, it can take on the properties of that mana.

As well as cutting through enemies with the blade, the user can manifest a giant tornado around the sword. Additionally, the sword has erosive properties, so even when it comes into contact with dense magic that it cannot initially cut, the sword will quickly weaken the material until it can be cut.

Trivia

 * Zephyrus, or Zephyr, is one of the wind gods from Greek mythology and commands the west wind.