Bab 1450: "Battle Mage Valkyries" 

Hydra immediately transformed back to his original size, and his lower body was even slightly submerged in the ocean when he was already flying as high as the Underworld Gate's upper height. 

Hydra that suddenly became big, almost squashed Code-L and the others around him to death if not for them moving out in the blink of an eye. 

But really. That mighty spear attack looked like a toothpick compared to Hydra's head, and when the 'golden toothpick' hit his head, Hydra only shook his head impatiently. 

Hey. How come it feels itchy? What did these winged women in armor throw at him? 

The first Valkyrie's attack undoubtedly failed, and the other Valkyries learned from the first Valkyrie's failure and judged that their weapons couldn't even hurt the big snake. 

Even if there were a lot of them, the attacks would just feel like being touched gently by a bunch of toothpicks.