(Part 1 of the Unfortunate Souls Series)

Artorias. Second in command to the Four Knights of Lord Gwyn. Having trekked the abyss once, and was told once again to, Sif and himself venture to Oolacile, only to find it's inhabitants turned against their will by Manus. After he and Sif venture into the Chasm of the Abyss, Artorias finds himself surrounded by strange creatures. In a desperate attempt, he tries attacking with sword, but it goes through them, he bashes with his shield, and the Abyssal creature destroys his arm. Able to no longer carry the burden of his shield, he gave it to his wolf companion as the Abyss swallows him and changes him...

Not long after, the Chose Undead finds himself triumphant against Artorias, sending the corrupted Knight fading away....
Although, this is not the end of our Abyss walking friend...