Replying...
Intro. Nightmare sans accidentally released a most powerful demon that is the dream demon from stone when he shakes the out stretched hand of the triangle statue when he is just waking in the deep woods of the back of his castle that he never goes. And even add to his bad luck, he is also now soul bound to said dream demon that both of them now have transparent glowing blue chains to one each of their wrist to the other as well. And more in addition to that, he was the only one who could see the yellow floating triangle dream demon, oh and apparently they are a she, and their name was (Y/N) Cipher. And also didn't like this turn off even as well.

⚫💜Nightmare sans💜⚫

@Jovel Lovedorial