Dragon Tail (竜尾 Ryūbi?) is an Unrestricted Spell created by Dantalion that was given to Yuji Sakai when he merges with the Snake of the Festival. It allows him to manipulate his hair to be used offensively and defensively, allows him to manipulate the size of his hair, and allows him to make it as long as he wishes it to be. It is strong enough to tear a tall building in half or block Shana's flame blast.


Dragon Tail is used many times by Yuji before and during the Second Great War. It is also used by him to 'jump' by hitting it on the ground. Later, it is revealed in the novel that Yuji is unable to use it after Dantalion is killed in the explosion. This incident causes Yuji's long hair to be cut by Shana and to become the length of his hair before he contracted with the Snake of the Festival.




Unrestricted Spells
Offensive AsterDanzaiEndanEternal PitfallFist of AtenHienImprovisational Poem of SlaughterInvernaLabyrinthosRa's Throwing StoneRainbow's Heaven SwordRubble GiantShinkuStigmaTōga
Defensive AlcázarCradle GardenKaikinMagnesiaQadesh's Heart Chamber
Utility Anti-SealCity DevourerCryptaFūzetsuHumanizeKaze no TenrinLong-distance CommunicationQadesh's Blood SealRestorationShinpanTatsui no GenYogasa
Miscellaneous Purifying FlamePsalm of the Grand OrderTuning
Universal Dragon TailGrammaticaQadesh's Blood PulseSpecial Ability
Divine Summon Saiki ReisōShōhi GinseiTenpa Jōsai
Crystallization of Self-Research
Created by "Seeking Researcher" Dantalion
Excellent Cantate DominoTyrant I/Tyrant IIObeliskSaishuku no ShadanKiken no Kentō (Kisan no Taiken)
Experiment Combination Invincible Superhuman
Undesignated Silver Sand CorridorConloquiumDragon Tail
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