Spells「術 Jutsu」 are operations of magical powers that can be triggered either inherently or by Incantation Orbs.
A spell can have a variety of different effects based entirely on what kind of spell it is, what type of spell it is, and the overall strength and magic power of the person casting the spell.
- Freeze Coffin「
凍結棺Tōketsukan (Furīzu Kofin)」: By performing a hand sign and tracing a rectangle through the air with her fingers, the caster is able to instantaneously freeze their opponent. The target is rendered immobile while frozen.
- Destroy Four Elements「
破壊の四大元素Hakai no Yondai Genso (Desutoroi Fō Eremento); literally meaning "Four Elements of Destruction"」: A formidable spell where four elements (specifically; water, earth, fire and air) are summoned and fused into a single, devastating energy attack that is fired at the enemy. The attack creates a large explosion upon impact.
- Fireball「ファイヤーボール Faiyābōru」:A spell that allows the caster to attack the opponent with a great fireball.
- Aqua Dress「
水の衣Mizu no Koromo (Akua Doresu); literally meaning "Water Dress"」: A spell that creates clothes made of water. By refracting the light in the water, the caster is able to hide the most "important" parts.
- Wave Dragon「
波竜Haryū (Uēbu Doragon)」: A spell that allows the caster to call many dragons made of water.
- Fire Storm「ファイアストーム Faia Sutōmu」: A spell that allows the caster to attack the opponent with a powerful blast of fire.
- Exterminate Ray「
殲滅の光Senmetsu no Hikari (Ekusutāmineito Rei); literally meaning "Light of Annihilation"」: A spell where the caster fires a disintegration beam, incinerating everything in the line of fire.
- Endless Whirl「
終わりなき渦Owari naki Uzu (Endoresu Wāru)」: A spell with which the caster creates a vortex of wind with an incredible destructive power, sucking their objectives towards its center. 
- Absolute Cancel「
絶対強制解除Zettai Kyōsei Kaijo (Abusoryūto Kyanseru)」: By placing their hands over a spell, the caster is able to completely erase it from existence. However, if the particularity of the magic is being sufficiently powerful, it may be difficult to erase completely, instead being temporarily suspended.
- Magic Cancel「
魔力解除Maryoku Kaijo (Majikku Kyanseru)」: A technique that allows the caster to cancel any magic that has been cast on an individual. Merlin was shown to cancel the effects of one of her own magical items.
- Magic Cancel「
- Perfect Cube「
完璧なる立方体Kanpeki naru Rippōtai (Pāfekuto Kyūbu)」: A spell that denies entry to anyone but the caster. Originating from the demon world, the spell surrounds a specified area and reflects all attacks, whether strong or weak, back at the opponent.
- Bend Room「
曲がる空間Magaru Kūkan (Bendo Rūmu)」: The caster traces their hand through the air in a distinct circular motion, changing the trajectory of an attack.
- Power Amplify「
魔力増幅Maryoku Zōfuku (Pawā Anpurifai)」: A spell that allows the caster to amplify the magic of their allies, making their attacks considerably more powerful.
- Shunkan Ido「
瞬間移動Shunkan Idō; literally meaning "Teleportation"」: High-level teleportation magic that allows the caster to appear and disappear at precise locations and teleport groups of people instantaneously. The spell effect radius of Merlin's teleportation is several miles wide, and her teleportation magic was shown to be much faster than that of the Liones Kingdom's greatest magician.
物体転移Buttai Ten'i (Apōto); literally meaning "Object Transition"」: A subsidiary teleportation technique that allows the caster to summon various objects, such as clothes and weapons, to themselves and their allies.
- Main article: Hellblaze
- Enchantment: Hellblaze「
付呪・ 「獄炎」Fuju (Enchanto): "Gokuen (Herubureizu)"」: A mysterious ability that can be used to enchant a weapon and allows the caster to generate black flames. The fire also has the additional effect of nullifying an immortal's regeneration.
- Enchantment: Resist Fire「
付呪 炎の耐性Fuju (Enchanto) Honoo no Taisei (Rejisuto Faiya)」: The damage received by the caster from fire-attribute attacks is greatly reduced.
- Enchantment: Resist Wind「
付呪 風の耐性Fuju (Enchanto) Kaze no Taisei (Rejisuto Uindo)」: The damage received by the caster from wind-attribute attacks is greatly reduced.
- Enchantment: Hard Protection「
付呪 防壁膜Fuju (Enchanto) Bōheki-maku (Hādo Purotekushon)」: A protective barrier is formed around the caster, capable of fending off physical attacks.
- Curse Engage「
呪いの婚約Noroi no Kon'yaku (Kāsu Engēji)」: A spell with which the caster creates a contract between two beings to control one of them. By placing a ring on the hand of the victim, this is subject to the spell that causes excruciating pain in their body every time they try to use magic against the other person or the other person saying the incantation "Remada". Each time the spell is used, the person affected will be covered by brands that are becoming larger and once these brands cover their entire body, the affected person will die. The victim is unable to ever remove the ring.
In the case of Incantation Orbs, a different spell is activated by different orbs that are characterized by distinctive symbols representing the spells.
Eternal Seal Spell
Eternal Seal Spell「
The Eternal Seal Spell is a trapping and sealing spell that has enough strength to contain ten Tyrant Dragons, each of whom had the strength to level an entire town singlehandedly. In the Baste Dungeon, the spell was set and designed to be a last-resort move, in case the Weird Fangs could not stop the Seven Deadly Sins from entering the dungeon. Even still, the spell was easily destroyed by Ban and Meliodas' greeting, and mere arm wrestling.
Hyper Recovery Spell
Hyper Recovery Spell「
The Hyper Recovery Spell is a healing spell that is capable of regenerating lost limbs, as well as curing minor injuries, of numerous organisms within a small range where the Incantation Orb is triggered. It is also capable of dispelling lethal powers, such as Acid. As the name suggests, the regeneration and healing process is not only super effective but also super quick and efficient.