Before Erza could do anything, it was too late.
Merlin had already killed her.
…
Or so it seemed.
Erza soul was sealed into her body, making her corpse an anchor.
It didn't made sense.
Merlin maybe consumed by the madness in her eyes, but even he should realize the obvious that she would instantly destroy the seal and revive herself….. However, Merlin put very powerful seal that wouldn't be breached instantly and would give him all the time he needed.
You see, Merlin and Morgan realized something after 5 years had passed.
Arthur was indeed the hero they had been searching for and these 5 years of struggle had confirmed it. It confirmed it all.
However, Arthur was still human and he had limits.
It wasn't the Caliburn that made him into the hero and the sword only purpose was that of a trail.
He was an pure blooded human.
With his own power as an human, he could become something greater than any heroes before him, even the gods themselves that were once heroes.