Unique Skills

Unique Skills are weapons skills in the game Sword Art Online, which the trait that are limited to a single player. The prerequisites for receiving this skills are unknown, but they are given to the most skilled players. Because Unique Skills are extremely rare, only two players were known have this skill: Heathcliff with Holy Sword; and Kirito with Dual Blades.

List of Unique Skills

 * Dual Blades
 * Holy Sword
 * Darkness Blade
 * Battoujutsu
 * Shurikenjutsu
 * Infinite Spear

Trivia

 * The aforementioned Unique Skills apart from Dual Blades and Holy Sword were supposed to be unlocked after reaching the 90th floor.
 * Kayaba had stated that Dual Blades was to be unlock to the player with the fastest reaction time, the player was supposed to be the hero that would face him at the top of the 100th Floor.
 * Kayaba also stated that there were only ten unique skills total, in contrast to the "unlimited" number of other skills.