Mfw ascians plans are confusing.
I'm actually really confused about how they thought this plan would work. So they created Zodiark. He saved them and became part of the star. They sacrificed themselves once to fill the star with life and then planned to fill it with vitality so they could sacrifice even more to bring back those who had died giving him life...

How would that work? How can he give the lives back when it would weaken him? How would feeding him more vitality work when he is the star at that point?