|Hanging Gardens of Babylon|
|Exterior | Interior|
|Title:||Aerial Garden of Vanity|
|Owner:||Assassin of Red|
|Maximum number of targets:||1000 people|
Hanging Gardens of Babylon: Aerial Garden of Vanity ( 虚栄の空中庭園, Hangingu Gādenzu obu Babiron: Kyoei no Kūchū Teien?) is the garden of Semiramis, a giant floating fortress which the Red Faction uses for their main base in the Great Holy Grail War. It is an enormous fortress capable of housing thousands of soldiers, assembled with systematically ordered floating masses, covered in floors of marble, stone balconies, many pillars, and every kind of plant life entangled and intertwined over the construct in a manner described as a "unification of unsightly disorder and luxurious beauty." It contains a throne room used as its main means of control, allowing her to cause it to activate by touching a large jewel on her throne's armrest.
It is an irregular Noble Phantasm that is impossible manifest with prana like regular Noble Phantasms. Like Caster of Black's Golem Keter Malkuth, it requires worldly materials and time to construct before it can be utilized. It is "vanity" itself, so the conditions for its activation are strict. In a process to construct that takes at least three days, soil, stone, minerals, wood, plants, and water of a fixed amount must be gathered from the land in which she once lived, ruins in the vicinity of Baghdad, Iraq, and only with their preparation can the activation proceed. The complicated ritual is due to that she did not create the construct, have anything to do with its construction, nor even have actually seen it during her lifetime.
Due to the misunderstandings of countless people, their mental image of it being built by her resounding strong, that has added the mystery to her legend after death, it has become her Noble Phantasm that she instinctively knows has been inscribed into her legend. The ritual allows for the "illusion" to become reality, becoming a Noble Phantasm that should be impossible to exist. As a counterfeit turned real, it therefore possesses "vanity" in its title, allowing those who know its truth to only feel a sort of scorn for its existence by feeling that "Semiramis didn’t build the Hanging Gardens." It can be said vanity is not fragile, and due to the materials having been gathered and the construct materialized, her vanity has been turned into "truth" in the modern age. Although previously an illusion, it is "far more absurd and ridiculous" than the real thing.
Rather than the description of a garden, or even a fortress, it is more aptly described as a floating weapon, manifested as a "enormous fortress hanging in the air" in line with its name. The act of it activating is enough to bring other Servants to awe, even eliciting a brief response from the normally stoic Lancer of Red. Although similar to a Temple constructed using Territory Creation, surpassing even the highest-grade normal Temples, it is not meant to be a fortification, but a Noble Phantasm for offensive use. It does not boast great speed, taking an hour to travel a number of kilometers, but it is capable of moving towards an enemy stronghold and "hanging" midair to prepare for attack. The only way for enemies to attack is with flying mounts or planes, but she can easily defend it with her flying Dragon Wing Warriors and powerful magecraft. Preparing spells before battle, she can immediately generate magical circles around her, above the opponent, and below the opponent to be launched at her leisure.
Her abilities are normally fairly low, but she boasts that nothing is impossible for her within its confines. Even if it is to travel to another country, it is always treated as her personal field that increases all of her parameters in rank, boosts her fame level to the highest class, and revises attacks in her favor. It becomes possible for her to utilize magecraft that reaches into the realm of Magic, using EX-ranked blasts capable of overwhelming even A-rank Magic Resistance. While she would not normally be able to construct an army sized amount of Dragon Tooth Warriors, creating three thousand for use in one battle is an easy task for her. The greatest weakness of the Noble Phantasm is that she only gains its benefits within it and becomes rendered nearly powerless upon leaving its confines, but it has no great impact on her due to it being a moving fortress that she has no need to leave. It can be compared to barricading herself in a fortress able to deploy weapons of mass destruction, likening a frontal assault on her as her enemies presenting themselves to be killed by her.