Square Strike

Square Strike (四角攻撃, Shikaku Kougeki) is a basic Sword Magic spell that can be used very effectively in combat.

Overview
The user manifests their magical aura into their blade and quickly performs two diagonal crosses from shoulder to opposite hip on either side of this body, which forms a small square. The square then expands, leaving behind a square of manifested magical aura for a few seconds. If Square Strike hits, the user is hit with three manifested blades of magical aura capable of piercing through not only flesh but armor as well. This spell is generally unavoidable, due to the fact that it is usually performed at point-blank range.

Trivia

 * Gif credits to the creators and animators of Sword Art Online.