Avicebron

**Aviceborn** (real name **Solomon ben Judah ibn Gabiro**l) is a philosopher, poet and a kabbalist of the 11th century that employs one of the main genres of magecraft, the Kabbalah.

## History

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. His wish was to complete his Noble Phantasm, Golem Keter Malkuth.

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.

Darnic meets with Caster to discuss the arrival of materials for golems, and he is told that they had just arrived after having been delayed due to the conflict with the Mage's Association. They also discuss Caster's Noble Phantasm, Golem Keter Malkuth, and the need for a core. As Darnic recommends being more prudent in their selection, Caster agrees he has been hasty in his need to complete it, deciding to refine its material components so that the core can be inserted afterward. Roche arrives with the delivered materials as Darnic leaves, and Caster continues his instructions on golem construction.

With the scouting of Kairi Sisigou and Saber of Red, several of his golems are sent to match them. Though their quality is enough to withstand multiple hits from Saber's sword, they easily fall to her blade. His scrying allows for him to later show the events to the rest of the Black Faction. They later return to their work, proceeding with their work on the insertion of Magic Circuit into golems, viewed by one of the homunculi who has recently gained as sense of self. The homunculus is one of three chosen for the experiment, but he later manages to escape before it can begin. Although homunculi are sent out to find the escapee on his orders, Rider finds and hides the homunculus from them.

As part of Darnic's plan to capture Berserker of Red, Several of Caster's golems are sent along with Rider to capture Berserker. However, neither Rider nor the golems are able to match Berserker, even after his legs are reverted to spirit form by Rider's Trap of Argalia. Berserker is then impaled by Lancer's Kazikli Bey yet still advances, but Caster commands his golems to meld together to imprison Berserker. After Berserker's contract is annulled, Caster is made into his Master by proxy. Soon afterwards though, Caster alerts Darnic that Rider is escaping the castle with the Homunculus, which prompts Darnic to send Gordes and Saber after them. In the anime adaption, after the Homunculus is healed by Saber's heart, Caster arrives with the remaining Masters and Servants of Black when they came to assess the situation regarding the Homunculus. After hearing Rider recount the event, Caster expresses his desire to use the Homunculus as the core of his Noble Phantasm, but he is denied by Ruler, who defends the Homunculus. After Ruler states the Homunculus has no involvement in the war, Caster refutes her by saying that the Homunculus is somewhat involved as he now possesses Saber's heart. Ultimately though, Lancer lets Ruler and the Homunculus, and Caster leaves with the others after shackling Rider.