Illfang the Kobold Lord was the boss of the 1st Floor of Aincrad in Sword Art Online.


It took a month to find the boss, as the players were having a hard time finding the boss room. Even Kirito, a beta tester had difficulty finding the boss room. Illfang the Kobold Lord was slain by Kirito, who gave the final blow to the boss, and received the last-attack bonus item, Coat of Midnight.

Appearance and Abilities

Illfang's First Floor Boss Room is twenty meters wide by 100 meters deep.

He is over two meters tall, muscular, and covered in blue-grey fur. His eyes are golden-red. Illfang uses a large bone axe and a leather shield to attack, and has four HP bars. Behind his waist, he carries a meter and half long Talwar weapon. Three Ruin Kobold Sentinels spawns and defend the boss from the players at the start, and with the depletion of each of Illfang's HP bars, an additional three Sentinels are spawned (a total of 12).

Once its health is down to 1/3, it will toss the weapons away in favor of a nodachi in which it can use katana skills. Illfang in the Closed Beta Test did not use a nodachi, it used a talwar.