"Open up!" Danny roared as he slammed his fist into the bronze door. A surge of internal energy exploded from his body.

The door shook with a deafening boom, and dust scattered, but nothing unusual happened. The symbols on its surface flickered briefly before fading.

"Hmm?" Danny froze as he stared at the undamaged door in disbelief.

With his natural strength and the power his techniques granted him, he had expected the bronze door to shatter easily. But what he saw before him completely defied his expectations.

The murmurs behind him only added to his unease. He had boasted so confidently about smashing the door open, yet it hadn't budged an inch. His face flushed with embarrassment.

"I don't believe it!" Danny took a deep breath and channeled all his internal energy into his fists before striking the bronze door again.

Another loud crash echoed as the bronze door trembled, and the dust fell off. The mysterious symbols on the door glowed once more. Like before, the door remain