Shana-fuzetsu circle
Name in Japanese封絶
Rōmaji TranslationFūzetsu
Debut (Anime)Shakugan no Shana Episode 01
Appears InAnime, Light Novels, Manga
InventorsDantalion, Leanan-sidhe
Technical Details

The Fūzetsu (封絶?, Seal, lit. "Seal of Suppression") is the most common of all Unrestricted Spells. It also refers to the special dimension the Method creates; here the Crimson Realm and the real world intermingle, and all sorts of causalities, including time, are stopped for ordinary living beings.


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 AsterDanzaiEndanEternal PitfallFist of AtenHienImprovisational Poem of SlaughterInvernaLabyrinthosRa's Throwing StoneRainbow's Heaven SwordRubble GiantShinkuStigmaTōga
Defensive AlcázarCradle GardenMagnesiaQadesh's Heart Chamber
Utility Anti-SealCity DevourerCryptaFūzetsuHumanizeKaze no TenrinLong-distance CommunicationQadesh's Blood SealShinpanTatsui no GenYogasa
Miscellaneous Purifying FlamePsalm of the Grand OrderTuning
Universal Dragon TailGrammaticaQadesh's Blood PulseSpecial Ability
Divine Summon Saiki ReisōShōhi GinseiTenpa Jōsai