He didn't attack the solid keratin layer, but precisely stabbed the Poisoned Claw Blade viciously into the relatively fragile inner joint gap of the battle demon's right elbow.
The "Order Burn" rune activated instantly, with Holy Flame mixed with poison erupting inside the joint.
"Aoooh——!"
Balzac let out a painful roar, the swing of the right arm Bone Blade immediately became sluggish.
Meanwhile, several bullets carrying strong "Dizziness" and "Magic Interference" effects accurately hit the battle demon's giant jaw joint and around its only remaining left eye—Nightingale's support arrived.
Though it couldn't cause substantial damage, it successfully disrupted its senses and spellcasting.
The battle demon, in frenzy, swept aggressively with the still-functional left arm Bone Blade, forcing back Rock who tried to get close.
Yet an almost imperceptible shadow adhered to its huge ankle like a maggot clinging to bones.
