Enryu's Thorn

, also referred as ' or ', was a massive object found at the location where Enryu killed the Forty-Third Floor Guardian. The needle was subsequently transformed into an Ignition Weapon by the Workshop researchers by an agreement with FUG. It now hovers above Viole's right shoulder in a compressed form, similar to Horyang's wing.

During the Workshop Battle, when combined with Baam, the Needle was referred to by the following item code: SS-1SSA.

History
Enryu's Needle is an item surrounded by mystery. Not much is known, solely that it was a massive object found at the location where the Irregular Enryu killed the Forty-Third Floor Guardian. It was somehow acquired by FUG, who found that it was a "dead inside and had a hollow body" and could not be used. The organization subsequently worked with the shady scientists of the Workshop to try and find ways to create living Ignition Weapons so that the Needle could be used to fulfill their objectives. FUG's intention was to give the Needle to the Slayer candidate Jyu Viole Grace to increase his power and aid them by killing Zahard. However a faction within FUG lead by Karaka and some Slayers decided that this was too risky and planned to merge Viole into the the Needle, activating it in a manner that would allow it to be used by anyone strong enough to wield it.

The Needle was hidden within an aquatic arena being used for the Workshop Battle Finals. In a turn of events it was stolen by Jyu Viole Grace. According to Hwa Ryun, the "Fake Needle" given to Viole acted as a "bowl" for the real one. When Beta trapped Viole inside the True Needle's Chamber, it started to slowly react with the original and begun its summoning. During the battle against Reflejo, the Needle emerged from its container, allowing Viole to win against Reflejo.

Powers and Abilities
When activated, the Needle drastically enhances Viole's Flow Control. However it also seems to tire him greatly. Koon deduced that it forcibly controls the Shinsoo in an area, a power that he considered "near god-like". However SIU said that the Needle wasn't fully activated yet and that it may work differently depending on who's using it, meaning that we haven't even seen it's full power yet. Also, SIU has mentioned that it is indeed a growing weapon meaning it can grow to be stronger than it already is and that it would burst out when needed.

Notes and Trivia

 * The Needle cannot talk.
 * It seems to be fitted with an "invisible mode".