Purple lightning flashed the instant Zach's miniature sun made contact with the Hydra's scaly back. The energy blasted a tiny hole in the skin and muscle that were harder than stone. The ball of condensed energy slipped into the Hydra's body, after which Zach lost control over it.
His hands crashed into the Hydra's body an instant after the ball was sucked into the Hydra. He crashed into the Hydra's thick skin.
It was like hitting the ground hand-first. If he hadn't been strong and powered by world essence energy, he would have broken both arms and cracked his head. Instead, he made a small indentation in the Hydra's back.
It was less than he had expected.
Following the ball, he had hoped to make a decent crater and open up a weak spot for him or Mandra to take advantage of.