"Roar!!!"
An earth-shaking roar erupted from Heracles's throat, the immense energy in his voice whipping up a blast of air.
Madness had long since made the great hero forget the distinction between a Master-a mage-and an ordinary person. All he saw was an enemy so intent on victory that he would stoop to the despicable act of attacking a child!
He heaved sideways with the Axe-Sword buried deep in the ground, sending an entire slab of earth, along with its snow and the blond man standing on it, flying dozens of meters away.
Yet the man showed not a trace of fear before the great hero's wrath. His eyes even gleamed with excitement, and a low laugh rumbled in his throat as he swiftly launched a counterattack.
Using the slab of earth beneath his feet as a springboard, he crouched and leaped, charging at Heracles again.
His rank-A personal skill, [Berserker], also gradually began to take effect. A composite of [Valor] and [Mad Enhancement], it not only increased his damage in melee and unarmed combat, but also nullified mental interference directed at him, including intimidation, confusion, and beguilement.
At that moment, the man chose to surrender his body entirely to instinct, becoming a beast that knew only battle.
Yet, in stark contrast, his swordplay suddenly became sharp and intricate, far removed from that of a "beast following its instincts."
"A Noble Phantasm's ability...?"
Tucked beneath the great hero's arm, Illya gradually grew accustomed to his movements. The unbearable dizziness slowly receded, and she regained her ability to think.
Although the man's intelligence and speech were no different from an ordinary person's, the fighting spirit radiating from him made it clear that he was a Servant of the same class as Heracles.
-The Azure Berserker.
There were generally two explanations for