Fighting is, from beginning to end, a skill that involves using one's own body in combat.
Excellent fighting skills and rigorous physical training can allow the body to perform at a limit of 150 percent, and then further display several times the combat efficiency.
A fighter who has been through numerous battles, even without extraordinary strength, can easily defeat two to a dozen of his kind.
With the right environment and equipment, it is actually possible to exert four or five times the overall combat power.
But still, he cannot defeat monsters.
"Because monsters might have been at least ten times stronger than mortals to begin with and moreover..."
Looking around, what was originally thought to be a passionate collision of muscle, blood, and sweat—a roar of fists and will—turned out to be...
"...if monsters cultivate, their talents and limits are higher, and they multiply by even more!"
