They are fundamentally different concepts.
The effect of the Boundless Sea is simple: by continuously deepening one's own energy system, it adopts the intent of the sea, making one's energy increasingly profound, and endless like the waves.
Manifested in Louis, it enhances the quality of blood energy and magic power, greatly increasing the efficiency of energy use.
The Anti-Magic Blade Light is more straightforward, allowing you to coat the blade light with the effect of shattering the Extraordinary method when using it.
Louis had already understood this before.
This effect allows a Sword Master to shatter martial skills, magic, or spells with the blade light when attacking.
One strengthens the body, the other breaks magic.
Combined, they form the simplest and purest "output machine."
As the understanding deepened, Louis finally realized how lucky he was to be able to counter it previously.
