C15 What's in the Tower

Yin Qijin had no idea what the old man had locked her in this tower for.

This tower appeared to be forty or fifty meters tall, but upon entering, it seemed to be endless. No matter how she walked, it would always look pitch-black.

She didn't dare walk up to the tower. The more she walked, the more she felt something enveloping her, making her want to run away.

Suddenly