Conceptual Weapons (概念武装, gainen busou?) are magical items that have often an accumulated history and cause more than physical interference as they execute a predetermined phenomenon. They can overwrite immortality with "natural life" to nullify such a condition, and apply concepts such as "severing and binding." They are made to directly crush the soul with a concept on a spiritual plane and affect space with semantics and logic. As Physical interference is not possible against formless things, such as manifestations of laws or delusions. That's why Conceptual Weapons exist, because beings that exist via concepts can only be killed by concepts.
List of Conceptual WeaponsEdit
- Alien Stomach World (used by the Burial Agency)
- Archer's cloak
- Barrel Replica (used by Sion Eltnam Atlasia)
- Black Barrel (used by Gun God)
- Black Keys (used by the Church)
- God Hand (used by Berserker, and works on a similar theory to Conceptual Weapons)
- Key of Providence (used by the Church)
- Rho Aias (used by Archer and Shirou Emiya)
- Scriptures (used by the Church)
- Seventh Holy Scripture (used by Ciel)
- Shroud of Martin (owned by Kirei Kotomine and used by Shirou Emiya)
- Shroud of Magdalene (used by Caren Hortensia)
- Thompson Contender (used by Kiritsugu Emiya)
- True Apocrypha (used by Riesbyfe Stridberg)
- Jeweled Sword of Zelretch (used by Kischur Zelretch Schweinorg and his heirs)
 Melty Blood Act Cadenza PS2 Manual - Dictionary: Conceptual Weapon [Term], p.058 English | Japanese
Conceptual Weapon [Term]
A weapon created to go beyond mere physical interference, and exert influence on concepts, natural providence, and space.
For instance, something that nullifies "eternal youth" by overwriting it with the idea of "natural lifespan".
Ciel's Seventh Holy Scripture contains the dual concepts of "reincarnation criticism" and "eternity without permanence".
By the way, after being killed by Shiki, Arcueid had at first mistakenly assumed that he must possess some kind of powerful conceptual armament.
 Fate/complete material III: World material - FAQ with Nasu: Magecraft and Magi, p.135
Q: Conceptual Weapons are soul smashers that beat the opponent not physically but with the weight of the soul, but would it be possible to kill only the soul of a normal person, rather than something supernatural?
English | Japanese
Q: Conceptual Weapons are fixed magical items which execute a predetermined phenomenon. They're soul smashers ("outbreakers") that beat the opponent not physically but with the weight of the soul, but would it be possible to kill only the soul of a normal person, rather than something supernatural?
A: Yes, but the effect would be reduced. Or rather, against a mundane opponent, mere physical attacks would suffice. Physical interference is not possible against formless things, such as manifestations of laws or delusions. That's why Conceptual Weapons exist, because beings that exist via concepts can only be killed by concepts.
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