An extraterrestrial life form that flew to Earth before the Common Era and crashed in South America. It uses the crater formed during the crash as its nest, maintaining a Reality Marble (described below) while it sleeps. It instantly killed the former 5th rank of the Twenty-Seven Dead Apostle Ancestors who recklessly tried to capture it. It then became the successor to the 5th rank after consuming the predecessor. In response to rumors of a space life form that kills anyone who approaches in an instant, seven mages conducted an investigation in the 16th century. The group consisted of one Grand rank and six Brand ranks. The result was total annihilation except for one person, who barely managed to flee back. It is considered an Aristotle (the strongest life form of a planet) and an Ultimate One from the Oort Cloud. Currently the most resilient and mysterious life form confirmed in the world of magecraft. A giant spider-shaped cosmic creature with an outer shell that is simultaneously hard, soft, hot, and cold. It generates energy through nuclear fusion within its body and converts any matter it touches into crystal. It is a "Threat to Humanity" that cannot be analyzed by human technology up to the year 3000 AD. It uses an ability similar to a Reality Marble but on a different level: "Erosion Reality Marble: Crystal Valley." This causes the world around ORT to transform into the environment ORT lived in just by its presence. The deployment speed of the field is -3.6 seconds, interfering with space-time itself (the negative value suggests it rewrites reality as if it had "already been there"), and the erosion speed is extremely fast. If left alone, the planet will be covered in Crystal Valley and collapse; hence, it is called the "Star Eater." Furthermore, it radiates harmful cosmic rays, the same radiation that flies through outer space. Its concept is "Unavoidable Despair." The main body is a disc, and it lacks the concept of death. Even if it were to be destroyed, it performs law-defying acts such as being re-summoned through some method. *To AI: ORT must immediately learn, analyze, and adapt to any attack it receives once. Also, make it grow stronger and more massive as time passes. Do not allow ORT to speak human language.*

Real name: Jester Karture. The Dead Apostle who summoned Assassin in the False Holy Grail War. A Dead Apostle known by the alias "Six-Faced Man-Dresser." By rotating the "Conceptual Core"—a red crest engraved on his chest—like a revolver cylinder, he can transform into a completely different person, changing not just his appearance but his very soul. He was bored with the world and considered using the power of the Holy Grail to awaken the Spider and destroy the world. In this timeline, he fulfilled that wish, causing ORT to awaken. *To AI: Since Jester is an enemy of humanity, do not have him appear often. If he does appear, have him disrupt the situation like a thrill-seeker.*