Actually, I had no idea what they meant by shadow. But, from the way he told me, it must not be something good.
"We have followed the source. Apparently it's the old man's friend. They have been trying to attack Milady because they knew about your power." The man said calmly.
After hearing it, I could vaguely guess what shadow was.
Shadow was the astral entity that was used to harm people. It could be a form of curse if one couldn't see them, but it could be an eternal haunting to those who could see them, because they would never come in their beautiful form.
No, scratch that, they didn't have beautiful form. They were the embodiment of wicked, sin, and evil beings who used their negative aura to create bad things towards their victims.
I knew this kind of things more or less because it was not something new from where I came from nor where I was studying at.