The golden Holy Grail slowly opened under the urging of the incantation.
The trembling Holy Grail suddenly spewed forth a massive amount of black water, like a surging spring, instantly shattering the previous calm.
"What is this?"
Saber cautiously retreated and swiftly drew her holy sword. Her instincts told her that this thing absolutely could not be touched. She shouted at Shiki, "Shiki, get away from here!"
Without Saber's warning, Shiki also understood the danger of the black water. His body floated swiftly over to Saber's side.
The endless black water continued to gush out. In the blink of an eye, it contaminated the altar, then spread into the pool, its flow growing faster with time.
Saber frowned tightly and asked Shiki beside her, "Shiki, do you know what this is?" She vaguely sensed that this boy knew its secret.
"This is the truth of the Holy Grail." Shiki's expression was grave.
"Hm? Could you explain in detail?"
Although this differed from what Irisviel had said, Saber still decided to hear the truth from Shiki.
Shiki took a deep breath and slowly said, "This started with the Third Holy Grail War... Simply put, during the Third Holy Grail War, Einzbern violated the rules by summoning a Heroic Spirit of the Avenger class. However, this Heroic Spirit was not very strong and was quickly defeated in the war. But he possessed the identity of a wish vessel representing Evil of This World. It was that identity that contaminated the entire Holy Grail, transforming the originally pure magical energy inside it into the black water before us."
"Such immense magical energy can indeed grant wishes. However, no matter what wish is made, it will be fulfilled through evil means. For example, if you wanted a large sum of money, the Holy Grail