"This is a sword of negation and betrayal, that nullifies every kind of magecraft in the world."
Rule Breaker: All Spells Must Be Broken (破戒すべき全ての符, Hakaisubeki Subete no Fu?, also translated as Destroyer of All Talismans) is a weapon that materializes the divinity of the witch of betrayal. It is an iridescent and jagged dagger that is thin, brittle, and blunt. Its effectively nonexistent capacity as a weapon is that of a regular dagger at most, and it would not be suitable for even killing a single person. She is able to use it against normal humans, slaying her original Master and cleanly cutting off Shirou's arm without issue. Shown by the complex shape of the blade, its actual purpose is that of a key used for rituals that is described by Caster as an "indulgence from the Age of Gods that is forgiven anything for one purpose." Such ceremonial knives are designed as mere decoration, and like those, Rule Breaker was created under the school of thought that it was never to be used as a weapon. Shirou feels an ominous feeling every time he encounters it, realizing it is dangerous to Servants after inadvertently analyzing it, manifesting as a feeling of pain in the Command Spells on his hand.
Greatly differing from other Noble Phantasms, its unique ability is that it is the ultimate anti-magic Noble Phantasm capable of dispelling and destroying any kind of thaumaturgy, an effect suitable to the Noble Phantasm that is a manifestation of Caster’s nature as the “Witch of Betrayal”. It "transgresses" on all the magecraft of the targets it pierces, contracts made from magical energy and life born from magical energy. Once it comes into contact with the ensorcelled item or person, enchantments, connections bounded through contracts, and creatures created and maintained by magical energy will all be returned to their original components in a state "before they were made." Contracts will be wiped clean and those with life will immediately cease to exist. There is a limit to what it is able to dispel, meaning artifacts on the rank of Noble Phantasm will never be returned to their original state no matter how low their rank.
While its uses are limited under normal means, it has high effectiveness in the Holy Grail War due to being able to manipulate the Servant System. It is a blade of betrayal that will sever all connections between a Master and Servant by destroying every single rule that controls them, giving full control of the Master's Command Spells to Caster. She uses this on both Saber and Archer, causing Shirou and Rin's Command Spells to instantly disappear and transfer to Caster after their contracts are nullified. She can also turn the dagger on herself, severing her contract with her Master without establishing a new one in its place. This does not seem to do anything to the Command Spells, as Atrum Galliasta did not lose his after Caster severed their contract this way; however, without a contract, they become vestigial and useless in Galliasta's attempts to force Caster to commit suicide. The Servants themselves must be the target, as it has no effect on Shirou's contract with Saber from simply stabbing his flesh. It is also capable of severing Angra Mainyu's hold on Sakura Matou after it is projected by Shirou.
- ↑ 1.0 1.1 1.2 1.3 1.4
 Fate/complete material III: World Material - The Servants of the Fifth Holy Grail War: Caster, p.030-031 [T]
Master: Souichirou Kuzuki
Alignment: Neutral Evil
Noble Phantasm: C
Medea, the daughter of King Aeëtes of Colchis in Greece, was a priestess taught by Hecate, the goddess of witchcraft. While she was raised without any discomfort, her fate was shaken greatly by the arrival of the ship Argo that sought the Golden Fleece.
Having fallen under the goddess Aphrodite's curse to fall in love with Jason, the Argo's captain, Medea stole the Golden Fleece from her father and attempted to flee the country together with Jason. Furthermore, to stall her father's ship that had been following them, she violently tore her brother to pieces and scattered his remains in the sea. With this, Medea lost a home she could return to, and came to be despised as a "witch" by the people. After that, Medea, in order to let her beloved Jason sit on the throne, continued to murder any opposition with magic and strategy, but her practices disgusted Jason and caused him to gradually become adverse to her. Eventually, Jason switched his interests to another woman, going so far as to have children, which Medea could not forgive. She murdered his new wife and children with magecraft, the brokenhearted Jason undergoing a miserable last moment.
Thus, Medea's obsessiveness and cruelty made calling her a "witch" appropriate, but despite committing inhuman deeds, she herself received no reward from this. Theories have been left behind that Medea, who achieved an immortal body from her devotion to the study of magecraft, became the reigning queen of the paradise, Elysium.
Having mastered magecraft from the Age of the Gods, Medea possessed extraordinary power as a magus. However, because her physical ability as a Servant was the lowest, she was at a disadvantage in battles against Servants with high Magic Resistance. Consequently, she faced the battles with basic tactics, avoiding personal combat to the best of her ability and using her Dragon Tooth Warriors as pawns. Even in combination with Kuzuki, he was the attacker and she bore the role of support with magecraft. She laid out a stratagem to summon Servant Assassin (Sasaki Kojirou) and order him to guard the Ryuudou temple gate while she gathered mana and used her own Noble Phantasm to destroy the other Servants' contracts and make them her allies.
Territory Creation: A
The ability to create a territory to gather mana is a special characteristic of the Caster class. Medea's inherent magical capacity is not that great but by expanding her territory to collect mana, it becomes possible for her to use high level magecraft. Moreover, because the place Medea selected to establish her territory is the underground limestone cave where the Greater Grail was instituted, Fuyuki City's greatest holy ground Ryuudou Temple, it is possible to gather an enormous amount of mana in a short time. She secured Ryuudou Temple as her main base solely to reserve enough mana to get Artoria and EMIYA to obey her after using "Rule Breaker" having summoning Servant Assassin independently. Furthermore, the influence of her created territory extends not only to Ryuudou Temple but also its surroundings. The rapid breakdown in the health of those inhabiting the periphery of the territory was because their life force was plundered for magical energy.
Because she understood the importance of the Ryuudou Temple territory the best, Sasaki Kojirou was ordered to guard the temple gate, and the interior was fortified so it could not be invaded easily. Furthermore, immediately following the beginning of the Holy Grail War, Medea almost never left the Ryuudou Temple, instead hiding on the grounds and raising mana. However, as soon as she made the judgment that she had collected enough magical energy for combat, she left the territory and turned on to the offensive.
Item Construction: A
Another skill granted to the Caster class. It is possible to construct enchanted tools, from implements of war to items for daily use. Many different articles can be made at will.
The dragon tooth warriors on the next page were made using this ability. In addition, it is also possible to make magical implements known as Mystic Codes. As Mystic Codes are used as devices to supplement thaumaturgy, or wielded as tools to activate specific effects during magical combat, this is a typical skill for a magus to possess. However, with an Item Construction rank of A, there is a great difference between the Mystic Codes that other magi build and the artifacts that Medea can create. Also, this skill requires time to gather components and manufacture items. This is why she spent most of her efforts on Territory Creation and focused on creating dragon tooth warriors. Though it requires preparation and planning, given enough time Item Construction has the potential to be a formidable asset.
High-Speed Divine Words: A
A skill that assists magical incantations. Normally, the length of an incantation increases with the scale of the thaumaturgy being performed, but this skill allows chants to be greatly abbreviated. It is particularly useful for direct attack magic. There are many examples of Medea personally using direct attack magic during the Holy Grail War, but in the fight against EMIYA she instantly unleashed countless blasts of light in an attack comparable to high thaumaturgy.
Caption: As long as a caster using High-Speed Divine Words has enough prana, she can continually fire powerful thaumaturgical attacks.
Golden Fleece: EX
The pelt of the golden-furred winged ram of Colchis. It contains the legend, "if thrown on the earth, a dragon will appear." Medea does not have the skill to summon the dragon, so she is unable to to do so even if she uses the Golden Fleece. This secret treasure might well have been the heart of the events that altered Medea's fate for the worse.
The Golden Fleece appears in Greek mythology, beginning with the marriage of King Athamas of Thessaly to his second wife Ino. Ino, who despised the children Athamas had with his first wife, the cloud goddess Nephele, plotted to kill the prince Phrixus by telling the king a false oracle and sacrificing the prince in a ritual. But then, Phrixus rescued his sister Helle at the altar. Helle rode a winged ram with golden fleece to safety, brought to her by Hermes, one of the Twelve Olympians. With the help of his sister, Phrixus went to Colchis, sacrificed the meat of the golden ram to Zeus, and offered its pelt to King Aeetes of Colchis. From then on, the Golden Fleece was passed down as a secret treasure of the royal house of Colchis.
Medea used many different types of magic during the Holy Grail War. Against nearby humans, she employed mind control, hypnosis, and other spells to gather intelligence and eliminate threats. She also used magic to lure Emiya Shirou into her own workshop.
In combat, she supported her Master Kuzuki Souichirou, who wielded the assassination technique "Snake." Souichirou, who seemed powerful enough to overwhelm a Servant, was actually being magically Reinforced to give him enough destructive power to damage a Servant.
Additionally, Medea used spatial teleportation whenever she was attacked. This spell was highly versatile.
Dragon Tooth Warriors
Magic that uses dragon teeth as foci to create golems. This is one of the magics Medea specialized in, passed down to the king of Colchis long ago. The combat strength of one dragon tooth soldier is no match for a Servant, and even a human Master can deal with one. However, they are dangerous in large numbers. Medea used these golems to buy time to advance her plans. The dragon tooth soldiers are not necessarily homogeneous in appearance, showing variations in the weapons they wield.
Type: Anti-Thaumaturgy Noble Phantasm
Range: 1 person
A Noble Phantasm with an ability clearly unlike that of the other Servants' Noble Phantasms. Its efficiency as a weapon is virtually nil, but it has the ability to "break" (as in, "violation of commandment" or "transgression of law") any magic on a target pierced by its blade. Targets that can be broken are contracts formed from prana, and life forms born from prana. Rule Breaker can reset the condition of the target to the state before magic was used on it. In other words, contracts formed from prana are wiped clean, and life forms created from prana are forcibly sublimated. Thus, its utility is quite limited, but it is extremely powerful within the context of the Servant system of the Holy Grail War.
In practice, Medea successfully used this Noble Phantasm to nullify the contracts between other Masters and their Servants. For a time, Artoria and EMIYA served Medea as her own Servants.
- ↑ 2.0 2.1 2.2
 Fate/Grand Order - Caster Profile [T]
Medea - Caster
Illustrator and Voice actor
Voice Actor: Tanaka Atsuko
Noble Phantasm: C
High-Speed Divine Words: A
Golden Fleece: EX
Territory Creation: A
Item Construction: A
Rule Breaker: All Spells Must Be Broken
Type: Anti-Thaumaturgy Noble Phantasm
The daughter of King Aeetes, possessor of the Golden Fleece, she was taught magecraft by the moon goddess Hecate.
Separated from her homeland by the hero Jason, at the end of a long wandering, she was burdened with the stigma of witch of betrayal and left this world.
Level 1 Bond
Source: Greek Mythology
Region: Greece, Corinth
Alignment: Neutral Evil Gender: Female
Based on experience, she does not trust good-looking men.
Level 2 Bond
A female magus that hides her face with a robe.
Cruel・cold-hearted, she is a genuine wicked woman who does not choose the means to achieve her objectives and makes evil designs her forte.
However, such personality was established as a reaction of the fate imposed on her.
A tragical woman who, a result of constantly facing betrayal, ended up falling on the standpoint of betraying people herself.
Level 3 Bond
"All Tokens that Ought to Be Broken"
Rank: C Type: Anti-Magecraft Noble Phantasm
A conceptual ritual tool that has given shape to Witch Meadea's lifetime.
A dagger that breaks all sorts of magecrafts. An Anti-Magecraft Noble Phantasm that restores objects strengthened by magical energy, relationships tied together by means of contracts and lifeforms created by means of magical energy.
Level 4 Bond
- Territory Creation: A
- Item Construction: A
- High-Speed Divine Words: A
All Skills deemed necessary for a magus are A Rank.
Her evaluation is low because she did not accomplish any sort of exploits in legends, but as a magus her competency can be described as top-ranking.
Level 5 Bond
Anybody can tell by associating with her for a while, but since she was a sheltered princess, her basis is that of a daughter of nobility possessing good sense and morals.
This is proven by the fact how, even while putting airs as a villain by saying things like "the humans in this town are all my property", she does not go as far as taking their lives.
Originally an innocent, talented woman who thoroughly devotes herself to the person she falls in love with.
Be that as it may, due to having a trauma regarding her loved one taking advantage and running away from her, she sticks to having a one-step-behind attitude.
She is weak to sincere people.
メディア - キャスター
- Territory Creation: A
 Fate/complete material II: Character material - Weapons: Rule Breaker, p.137
All Spells Must Be Broken
According to Caster, “This is a sword of negation and betrayal, that nullifies every kind of magecraft in the world.” Capable of returning objects strengthened with magical energy to their former state and nullifying connections bound by contracts, it could be said to be the ultimate “anti-magic” Noble Phantasm. It is an effect suitable to the Noble Phantasm that is a manifestation of Caster’s nature as the “Witch of Betrayal”.
As the complex shape of the blade would suggest, it isn’t a very powerful weapon. It’s probably only about as strong as a normal knife. Traditionally, ceremonial knives were never meant to be used as weapons, and were designed as mere decoration. This knife was created under that school of thought.
キャス夕ー曰く「この世界にかけられたあらゆる魔術を無効化する、裏切りと否定の剣」。究極の“対魔術宝 具”と呼べる存在であり、魔力によって強化された物や作られた物すべてを以前の状態に戻したり、契約によっ てつながった関係を破壊する。その効果は、“裏切りの魔女”と呼ばれるキャスターの神性を具現化させた宝具 にふさわしい。
複雑な形をした刃の見た目通り、物理的な攻撃力は微弱。普通のナイフと同程度の攻撃力と言えるだろう。古 来、儀式に使われていた剣は武器という目的ではなく、装飾具的な意匠になっていた。この剣もその流れに入る 剣だと言えよう。
 Fate/side material - Encyclopedia: All Spells Must Be Broken [Noble Phantasm], p.069 [T]
All Spells Must Be Broken [Noble Phantasm]
A dagger that can destroy any sorcery.
It is an anti-sorcery Noble Phantasm, that returns any objects strengthened with magical energy, connections bound by contracts, or life forms created out of magical energy, to a state prior to their "creation".
Of course, there are limits. No matter how low the rank, it is impossible for Rule Breaker to affect a Noble Phantasm.
It is truly a Noble Phantasm befitting Caster, and was used to capture and monopolize Saber.
An unassumingly fearsome Noble Phantasm.
- ↑ Fate/stay night [Unlimited Blade Works] Episode 14