Caster of Black

Caster of "Black" ("黒"のキャスター) is the Caster-class Servant of Roche Flyn Yggdmillennia as part of the Black Faction in the Great Holy Grail War of Fate/Apocrypha. He was not part of the designs for the original canceled online game project.

Appearance
Caster wears a featureless mask without openings for eyes or a mouth, a full-body suit, and a blue mantle.

Identity
Caster is, also known as Avicebron (アヴィケブロン), a twelfth-century poet and philosopher. He was born in Malaga, Spain, and although he did not have the glory of a knight or king or the recognition of having produced works of art that would prosper for thousands of years, he was the father of an entire thaumaturgical system, Kabbalah, and one of the starting points of the process leading up to the European through bringing Greco-Arabic and Jewish lore and enlightenment to the cultural circles of Europe. He is recognized as a "hero" who heavily influenced both the history of the world and thaumaturgy.

Personality
Caster is noted to be eccentric, and he sometimes does not speak even when addressed, simply nodding in affirmation. He had a poor constitution and pessimistic bent in life, so he had been reluctant to come in contact with other people. He was able to hold conversation with others, but never placed any emotion into the exchange. Due to his specialty in a single type of thaumaturgy as a magus, he never had worries about the miscellaneous chores of his abode.

Roche refers to him as master (先生) out of respect. Roche is similarly cynical, but the two have a good working relationship. Although Roche is an ideal Master for him, he seems to have plans of his own, noting that it is only ideal for the time being.

Fate/Apocrypha
Caster is summoned by Roche two months before the Holy Grail War, around the same time as Lancer of Black. They spend the majority of their time manufacturing golems as a war force within their workshop in the Fortress of Millennia. He is busy designing his Noble Phantasm, so it takes him longer to prepare for the multiple summoning ritual to bring forth the remaining Servants. Appearing silently before Roche's side, they watch the ritual and then return to their work.

Abilities
Caster has the ability to manufacture golems, doll servants, through his Kabbalistic techniques and Territory Creation. His workshop within the fortress is not one specialized in defense, but rather more like a factory specialized in golem construction. Devoting himself to their creation, he can produce thirty golems in a single day, and over a two month period he is able to manufacture over a thousand of them with Roche. He uses them to work around the workshop, organizing tools and cleaning as needed. He also uses his workshop to design his Noble Phantasm, Golem Keter Malkuth.

They are inhuman creations of stone and bronze compared to humanoid homunculi. Their quality is such that a modern magus would barely be able to build a single one of them in a year's time, and they possess fluid movements without a trace of the typical awkwardness displayed by golems. They come in various shapes and types, such a slender one made from spirit wood, those in the form of humans, those with limbs like spiders, and many others. He uses materials like jewels for organs and parchment for their skin, each at least eight hundred years old, in great quantities.

They are an incomparable war force able to easily match average magi in combat, though they will never be a match for a Servant. Though they lack in numbers, their sheer recklessness utilizing their large bodies and stone fists to destroy their enemies makes up for that. They are divided into three groups by size, and they are noted to be eagerly awaiting battle. They are still valuable enough as stumbling blocks for Servants, and they have the potential to defeat those unsuited to close combat like Caster or Assassin.