Celestial Blades

Dual Blades is a unique skill of Sword Art Online that is only seen in the Chaos Labyrinth and the Dreamscape Project. It is also a skill that can be accessed by anyone in ALfheim Online, seen in Dance of the Fairies and Hell Tree.

Overview
People have been using swords since the dawn of time. Wielding two weapons at once was unsightly and impractical. However, that is not the case within virtual reality. Or at least, that was what thought when he created Sword Art Online and began creating ALfheim Online as a side project. He had made the skill unique, only accessible by a person who had the fastest reaction speeds. However, in ALO, he had at first set it as unique but changed his mind and made it a unique skill that can be obtained by five people with extremely fast reactions.

The Dual Blades skill gives a 2x boost to attack power and sword skill activation speed and reduces SP used by 25%.

Acquisition
As stated above, the prerequisites of gaining

Base Techniques

 * Spinning Totality - Rendered corrupt after server-wide glitch on the 75th floor
 * Myriad of Spikes - Rendered corrupt after server-wide glitch on the 75th floor
 * Final Revolution - Replaced Spinning Totality
 * Gale Cutter - Replaced Myriad of Spikes
 * Depth Impact
 * Locus Hexedra
 * Specula Cross
 * Dead End
 * Radial Shine
 * Crimson Splash
 * Rage Inferno
 * Nightmare Rain
 * Starburst Stream
 * The Eclipse
 * Nebular Empress - Esoteric Skill unlocked after defeating Princess Valnagia in the Sword Skills That Surpass God Hollow Mission

Unique Techniques

 * Secretcalibur - Owned by Shiota; a massive damage-dealing 12-hit sword skill
 * Nebular Empress - Owned by Rain; a powerful 25-hit sword skill