Just as Rhode expected.
As a matter of fact, the instant Erin stepped onto this mysterious land, she instinctively tried to return to her usual form. After all, this place felt too strange for her. For safety's sake, she believed that transforming to her dragon form would ensure her safety. But shortly after, she discovered an unknown force imprisoning her body, stopping her from transforming. Not only that, but she also realized that her strength was diminished drastically. Just as Rhode predicted, even though Erin was a dependent of darkness, her rule was the rare 'moon'. Although the moon was a source of light in the darkness, the moon didn't exist in this world of shadow. In other words, this environment was the most disadvantageous for her, where she wouldn't face such challenges even on Earth. But here, she had no choice but to face the dilemma of losing the moon's support.