One of the treasures stored within the Gate of Babylon, it was said to be capable of rejuvenating a person's body in an instant.
This was a magical herb the King of Heroes had picked up on his way to the Underworld in search of immortality. Naturally, it could also be used simply as a healing medicine.
The moment it entered his throat, Shirou felt his limbs grow lighter, while the magical energy within his body began flowing rapidly once more.
"Thanks, Arch..."
The red-haired boy raised his head, ready to express his gratitude, only to discover that the King of Heroes had already vanished without a sound.
"The Lesser Holy Grail should act like a Lesser Holy Grail... Quietly accept the souls."
Kirei Kotomine silently watched Irisviel, who had lost her breath.
When he crushed the homunculus's heart, Kirei Kotomine had also taken special care to apply magecraft.
Although her body had died completely, her function as the Lesser Holy Grail would not change.
Compared to a homunculus whose whereabouts could not be controlled, this was much easier to control—that was the order he had received.
Kirei Kotomine approached Irisviel's corpse expressionlessly.
To allow the dead Irisviel to continue serving as the Lesser Holy Grail, a series of further magical treatments were required.
The young man crouched down and reached toward the corpse, but just then—
Irisviel, whose death had already been confirmed, suddenly opened her eyes wide.
"Kirei Kotomine!!!!"
The Silver-haired, red-eyed homunculus somehow produced a dagger and lunged forward, driving it into Kirei Kotomine's chest.
"Ugh...!?"
The young Executor cried out and sent the homunculus who had tried to tackle him flying with a single punch.
Kirei Kotomine wore an incredulous expression. "How is this possible..."
He had confirmed it just now. Irisviel had definitely