In an instant, several lingering afterimages of his blade strikes filled the room. Their trajectories were erratic, accompanied by the faint, sharp whistle of air being torn asunder.
At that moment, he felt his attunement with "Fleeting Shadow" reach a critical point, his mind completely immersed in its transcendent, supreme speed.
The momentum of his blade had yet to fade, but the form had already changed.
"Flowing Rainbow: Surging Waves!"
As the blade edge cut through the air, the sharp whistle was replaced by a low rumble, like a surging tide.
The glint of the blade was no longer erratic. Instead, it came in layer upon layer, each wave of light pushing the one before it, surging forward and building in power.
As the light from the blade stacked, it grew heavier and more solid. The air, compressed by the immense power, seemed to groan under the strain.
