The Covenant

Abilene Danvers is the twin sister to Caleb. The women in the covenant draw their magic from the four elements. The nature of their magic doesn't age them. The men in the covenant have a magic that will slowly drain their life if they overuse. One way to prevent it is to mix their magic with a nature witch and bond their souls together. Chase Collins shows up a week before the twins ascend into full power and he wants not only Caleb's magic, but to bond his soul with Abilene.