The Fūzetsu (封絶?, Seal, lit. "Seal of Suppression") is a dome-shaped isolated space which is detached from the flow of cause and effect of the world, with its interior area frozen and concealed from the outside. It is the most common of all Unrestricted Spells. All sorts of causalities, including time, are stopped for ordinary living beings, allowing Crimson Denizens to act freely within them.


The mad scientist Lord Dantalion originally created the complex and flawed version of the Seal. Later, the genius spell-creator Denizen Leanan-sidhe fixed it into the easier modern version, which quickly spread over all related beings in the world. Flame Haze are able to create this Seal at will, as are many Crimson Denizens. However, battles in the Seal can damage real world objects, and harm the paused living beings, though thankfully for both it is possible to reverse the effects if one uses enough Power of Existence. However, if the Seal is ever unlocked during a battle, the damage is irreparable.
Fuzetsu dimension

Yuji and Wilhelmina training in the Fuzetsu dimension


  • The widespread of Seal results in the decrement of Flame Haze in modern days since the people trapped inside the Seal are oblivious of Crimson Denizen's doing. The other result is the war waged by Denizens who oppose being hidden in the world known as the Révolution War.
  • It is explained by Friagne that the Seal's pattern and design are different with each user.[1]
  • In the light novels, the Fūzetsu is often described as a "heat haze dome" (陽炎のドーム kagerō no dōmu?).[2][3]



Unrestricted Spells
Offensive AsterDanzaiDraken's RoarEndanEternal PitfallFist of AtenGreat BreakthroughGripen's HowlGuren no KyowanGuren no ŌdachiHienImprovisational Poem of SlaughterInvernaIron Hammer of NesaKnightsLegionRa's Throwing StoneRainbow's Heaven SwordRubble GiantShadow IntrusionShinkuStigmaThunderbolt KickTōga
Defensive AlcázarCradle GardenKaikinMagnesia
Utility Anti-SealCity DevourerCryptaFūzetsuGuren no SōyokuHumanizeIllusionKaze no TenrinKey ThreadLabyrinthosLong-distance CommunicationNobiliacumOlfactory Sense of DesireQadesh's Blood SealQadesh's Heart ChamberRestorationShinpanTatsui no GenUnrestricted Spell Insignia of ReincarnationWater ManipulationYogasa
Miscellaneous Psalm of the Grand OrderPurifying FlameResummoningTuning
Universal Dragon TailGrammaticaMonument StrongholdPure CoffinQadesh's Blood PulseRibbonsSabaeru KazeSpecial AbilityTransformationWall of Miasmal Screen
Divine Summoning*
*Not Unrestricted Spells
Saiki Reisō (Black Misudare) • Shōhi GinseiTenpa Jōsai (Crimson Curtain)
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