Nana explained that instead of randomly killing people and wiping them all out, Elena agreed to the deal. So, whenever Elena asked, the village chief would give out the sick or the old, claiming their lives were of no meaning.
However, this agreement only worked for a while before problems began to spring up. No one wanted to give up their loved ones for the sake of the village, and even after some time, there were no sick or old people left among them.
But lucky for them, Elena simply disappeared along with her sister and the remaining vampires under them. There were rumours that both sisters had a clash. And the villagers thought it was over. Only for her to appear five years later, and the tradition began again.
This time, the village chief created a rule that said each family, when it came to their turn, must pick a family member to offer to Elena. Whichever family refused this order would have their entire lineage sacrificed.