Caster of Black (Solomon ibn Gabirol)

Caster of "Black" ("黒"のキャスター, "Kuro" no Kyasutā?) 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.
Caster is Solomon ibn Gabirol, also known as Avicebron (アヴィケブロン, Avikeburon?), 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 Renaissance 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.