Before he could summon more Noble Phantasms and fire them at Heracles, a surge of magical energy that made his heart tremble had already erupted from Red A in the distance.
"Treat Rin better from now on."
"Don't worry... little brother!"
"So you really do know me... Big Sister Illya..."
No matter which world it was, Shirou Emiya was Kiritsugu Emiya's adopted son—Illya's little brother. So even though Red A knew Illya intended for him and Golden Flash to perish together, he did not refuse. At this point, he had even less magical energy left than Golden Flash. There was only one way to unleash Excalibur: destroy himself and squeeze out every last trace of magical energy from his body.
"Damn mongrel!"
With no other choice, Golden Flash could only spare Heracles for the moment and take out... a golden key.
EA's true form was not a sword, but the key to the Gate of Babylon. It possessed the special power to destroy one world and recreate another. Though it was not a sword, its might surpassed any Holy Sword or demonic sword. Even Excalibur—the planetary creation known as the pinnacle of Holy Swords—was no match for it under normal circumstances.
Countless red patterns stretched out from the golden key, instantly spreading across the entire sky.
The next moment, those red patterns withdrew, and the key in Golden Flash's hand had transformed into a strange longsword with a golden hilt and three black cylinders forming its blade.
"The time of judgment has come! Let your death bring an end to everything—Enuma Elish!"
The black cylinders spun at tremendous speed, and the red magical patterns flashed with blinding brilliance. The indescribably terrifying power twisted the spacetime and world around Golden Flash.
Red A still held the Holy Sword aloft without attacking.