For ordinary Heroic Spirits, releasing a Noble Phantasm's true name was generally treated as a trump card.
After all, Noble Phantasms such as Anti-Fortress and Anti-Army types were immensely destructive, but they also consumed a considerable amount of magical energy.
But for Saber and Black Saber as they were now, neither needed to worry about that at all.
One had become a vessel for All the World's Evil, with practically inexhaustible magical energy. The other, as an Avenger, possessed the class skill Self-Recovery (Mana). In a sense, Black Saber was another source of All the World's Evil.
Do not forget that the Holy Grail had been corrupted because of Avenger Angra Mainyu in the Third Holy Grail War.
And Angra Mainyu was an Avenger, while Black Saber was also an Avenger. In terms of prestige, she was no less impressive than the other. The only difference was that the All the World's Evil within Saber had accumulated for a full seventy years.
Yet even though the All the World's Evil within Saber was more powerful now, Black Saber had the class advantage of an Avenger, along with the power boost from nearly ten Command Spells. Thus, when their Noble Phantasms clashed head-on, the two still fought to a draw.
Watching Saber's Noble Phantasm, Excalibur, transform upon the release of its true name from a torrent of light into the abyssal darkness it had become now, Rin Tohsaka and Shirou Emiya, who were fighting in the distance, wore troubled expressions.
They could sense that Saber was now completely different from the Saber who had once upheld the spirit of chivalry. Yet they had no way of stopping any of this.
If Saber had not absorbed All the World's Evil back then, the Black Mud flowing down Mount Enzou would have caused