Oldest_Dream

I've been looking for ages to find a certain novel that had a promo Manhwa on here (╥﹏╥)
It was set in cultivator world with a female mc with long white hair and terminal illness. The plot was basically her being sold off by elders of her sect to be married off to a son of demonic sect leader, I think.. it had a romance setting and the male lead was looking for a cure for her to stay alive by his side (I think, I'm not sure). I recently remembered it existed and I would love to read it but I cannot find it's title..