Sarah was in her room, reading a book while lying down on her bed.
Although it was not healthy for her to be awake at this hour, she couldn't sleep right away because of all the things going on inside her head.
The story Alex shared about the Curse and the side effects he has been inflicted with by using the Curse's power. All of it had left her restless.
That's why she has been researching something that might be useful for Alex.
Sacrificial ritual to enhance someone's vitality.
There were some mentions in the ancient book about a ritual which was used in the olden times, to increase the vitality of important figures, like the Pope or a King.
As the name suggests, it takes the sacrifice of several lives to perform the ritual.
However, in the name of sacrifice, not just anyone could be pushed into flames and expect the ritual to work. Rather those who have good karma, provide more vitality upon being sacrificed.