Darkness

 is an unknown thing inside of the VRMMORPGs Sword Art Online and New ALfheim Online. Curently, it is just used by two players, Galant and Mordread.

Background
It is unknown how it appeared in the game. What it is known, is that it is vinculated to the purity of the souls and hearts of the player, capable of detecting their feelings, emotings, thoughts, and other things realtives to the human soul.

Kirei Kyosho, Yamato, Antinomy and Hephaestus are aware of darkness, and threfore stay way distance from it, and their wish of revange towards everybody.

Properties
Darkness does not have phisical form, rather, is present in all the game at the same time. It is adquired by player with a strong desire for vegeance.

This develops when he or she rage when gets angry, upset or enreaged, the player eyes turn into crimson red. Furthermore, it levels up all stamina, strenght, speed, speed of reaction, etc...but as cost, the player looses his capability of thingking, and is pretty much controled by darkness temporarly.

Still, a player that has fully accepted this, is "fused" with darkness, as it becomes one with him, making his eyes all the time red, and no posibility of turning it back again as it was.

If a player is exposed to Skieth, while having darkness, it causes him to loose the pain innivator, besides of the fact of that player bleeds, but, it can be re-healed by a crystal or regeneration( which lastes longer). Also they do not loose thier HP bar. The player also see their overal ability

Galant
Galant darkness was develot after the death of his friends and his wife, and the disire of killing those responsable, Laughing Coffin. Galant's eyes turn crimson red when he is enraged, entering a berseker form, known as "Wrath Galant", in which, he recives an upgrade in his overal ability. Still, this ment leaving his sences behind. Galant was bit by bit consumed by it, he recived a dagger Carnwennan, which turns darker the more consumed by darkness he is.

He seem to have learned to controle it, entering it by personal will by blinking his eyes. Galant reconices it is a dangerous thing, but that he need it, much like he needs to have his revenge. He also sees that it is his best weapon.

Mordread
Mordread was consumed by darkness after Galant "betrayed" him. But, in strack contrast to him, he accepted it. This is why his skills at battle and hand to hand combat are so high. Besides, he was also exposed to Skieth, what leveled up even more his abilities, at a few cost (according to him).

Mordread's eyes are constantly red, due to his acceptance to his vengaence. This caused an enourmus change of his former personality, and just thev thought of getting regenge on Galant.

Trivia

 * Ishi was almost stained by darkness.