@Eve Saan
Spoiler!
His message to her back then was either shut up or die. In the novel it was implied that she forced him to make her the the empress and legitimate companion but he didn’t care back then, so he just sent her the scarf as a warning, thinking that MC would choose not kill herself but she did.
So after she died, he suffers from the after effects of vomiting black blood 12x a day for around 2 to 3 years before going mad and killing everyone then turned back time.
So after she died, he suffers from the after effects of vomiting black blood 12x a day for around 2 to 3 years before going mad and killing everyone then turned back time.
I like to post spoilers for the stories I find interesting because I don't have much time to read novel due to busy schedule
you will find me in most romantic historical manhwa comment sections 
you will find me in most romantic historical manhwa comment sections 