Gordian Knot (非常手段（ゴルディアン・ノット） Hijō Shudan (Gorudian Notto) , lit. Emergency Measure) are a set of "artificially-made" Treasure Tools crafted by "Seeking Researcher" Dantalion for Bel Peol who gives them to her subordinates. They are made from the material called "Demigold". Each Gordian Knot contains a certain Unrestricted Method which is triggered when the person wielding it dies (thus igniting the 'fuse' inside). Noted effects of Gordian Knots are: transportation (originally possessed by Bifrons; later used by Sabrac) and energy outburst (activated at Vine's death), resulting in the destruction of the Tendōkyū.
The Gordian Knot as used by Vine took the shape of a golden key that he wore around his neck.
- The name of this Treasure Tool is a reference to the Gordian Knot legend associated with Alexander the Great.
|Offensive||Blutsauger • Bubble Loot • Chorde • Dance Party • Hystrix • Kiken no Kentō • Kisan no Taiken • Nietono no Shana • Regular Sharp • Traverso • Trigger Happy|
|Defensive||Azure • Bakuyagai • Orgel • Robe • Tarnkappe|
|Utility||Caina • Crystal Altar • Gehinnom • Giralda • Jettatura • Nine Eternal Divine Scales • Nomenclator • Obelisk • Reiji Maigo • Reshuffle • Saishuku no Shadan • Seireiden • Tendōkyū • Tessera|
|Miscellaneous||Atalante • Nachtigall • Trivia|
|Universal||Gordian Knot • Mekest • Shintetsu Nyoi • Tartaros • Trigon|