Aestus Domus Aurea

Aestus Domus Aurea: Golden Theater of the Flamboyant is the, the theater designed by Nero and constructed in Rome during her lifetime, given form and reproduced through magical energy with a method extremely similar to that used by Reality Marbles. It is different from a Reality Marble, which covered the current World with a different World. The Golden Theater could persist for long periods because it was built on top of the current World. Rather than being a materialization of her inner world, it is High-Thamaturgy that only Nero can perform, who believes without a doubt that before her status as an emperor, she is "an artist who rivals " and "a chariot driver that rivals ". It is an "absolute imperial zone" which allows the owner to achieve their aspirations.

This Noble Phantasm represents the explosion of her bothersome artistic talent. Its precise name was Aestus Estus Domus Aurea. In Latin, Aestus Estus meant "passion" and "heat", while Domus Aurea was the name of the theater that was constructed. It was the manifestation of the tale of Nero declaring "Heed my song!" and locking everyone in the theater to listen to her singing. It created a Golden Theater in which everything was advantageous to Nero, and made it into a battlefield. While deployed, enemies trapped are weakened and buildings can be customized by changing its shapes and functions. Putting it simply, she can ignore the building process and project the buildings instead, in which she can then invoke her own rules. When the Golden Theater activates, Nero's sword would be shrouded in flames like that of, causing an inferno, and rose petals would dance in the air. It seemed that there was the Silver Workshop for Saber's artistic endeavors, and the "Blazing Kitchen" for cooking competitions. Such was the will of Her Majesty.

When the theater was first opened for business, many of the spectators left midway through the performance, causing an outraged Nero to blockade all doorways once the second performance began and not let even one person leave until the curtains of the stage were down. As a result, escape - without Nero's permission or cessation of the Phantasm - is virtually impossible. In the game, the ability causes Saber's attacks to ignore the opponent's defense, and the opponents are made progressively weaker over time.

Charitas Domus Aurora
Charitas Domus Aurora: Auroral Theater of the Delirium is the Noble Phantasm of Nero Claudius as Saber Venus. Nero first materializes Aestus Domus Aurea to entrap the target while preparing to attack with the Photon Ray sword she obtained from Altera. She then makes a powerful strike that unleashes a pillar of light through the array of magic circles similar to Teardrop Photon Ray to destroy the target. It is powerful enough to even overcome the Velber Ark's multidimensional defenses set up by Archimedes.

Laus Saint Claudius
Laus Saint Claudius: Imperium of the Maiden's Flowery Words is a sword skill used by Nero Claudius Caesar Augustus Germanicus in Aestus Domus Aurea, where she dashes forward and performs a slash that seems to create an effect of petals flowing with it, thus following her theme of flowers. It is registered as a Noble Phantasm within the Fate/Grand Order setting.