At some point, the demon was captured by hunters John Winchester and Tara. The two interrogated the demon who told them of the Knights of Hell and the First Blade used by the archangels to execute the Knights. The demon was eventually exorcised by John and Tara. Afterwards, John made a note in his journal about the encounter and put some information into a file in one of his lock-ups, but didn't believe the demon's story about the Knights of Hell and the First Blade, thinking he was lying to save himself. Tara believed the demon however and took notes on the information he gave them. Tara began a search for the First Blade that lasted years but was ultimately futile based on what the demon told her.
At the same time, the King of the Crossroads, Crowley, sent a demon named Smitty looking for the First Blade. Smitty eventually heard about this demon and his claimed knowledge of the First Blade, but he was exorcised by John and Tara before Smitty could catch up with him.
In 2013, after the appearance of Abaddon, John's son Sam looked through his journal for information and found John's notes on his interrogation of this demon. Sam informed Dean and Henry about what the journal said including the fact that Abaddon is a Knight of Hell. This caused Henry to tell the Winchesters about the Knights of Hell and how they were all supposedly wiped out by the archangels a long time ago.
In 2014, Crowley approaches Dean for help in finding the First Blade to kill Abaddon. Crowley tells Dean about how the closest he got was when Smitty heard about Abaddon's protégé before the protégé was captured by John Winchester. Crowley asks Dean to check if John recorded anything useful the demon might've told him in his journal. Following information in the journal and John's Lock-Up, Dean and Crowley are able to locate Tara who tells them what the demon told her and John about the First Blade and the Knights of Hell.
Powers and Abilities
This demon appeared to be a regular low-level demon with the powers of one.
- Demonic Possession - As a demon, he needed a vessel to walk the Earth.
- Immortality - As a demon, he would never age or die unless killed.
- Invulnerability - As a demon, he was invulnerable to normal methods of harm.
As a regular low-level demon, he possessed all the weaknesses of one.
- Devil's trap - As a regular low-level demon, he could easily be trapped by a devil's trap.
- Exorcism - As a regular low-level demon, he could easily be exorcised as John Winchester and Tara did.