Narnia- rewrite (different P.O.V)

When Alyvia is sent by her father to Aslan she learns she can control the elements through a weapon of her choice to fight in the war against the white queen for the freedom of her home Narnia. Yet she is set back by the daughters of eve and the son of Adam. The ones of the prophecy, she must help them to victory but is slowing falling for the oldest. That is not the plan. Should she follow orders or find her own fate?