Eternal Blade

Her father is gone. Every man she's ever known... vanished. Cursed to a hellish limbo called the Soulless Citadel by a Dark Warlord, the Light Walker Warriors have been trapped between realms for ten years. Emerald grew up in their absence. She trained, she fought, she pushed every boundary her mother set — and now she may be the only one who can bring them home. The prophecy is clear. The last descendant of the Murakai Bloodline must gather the Almighty Gemstones, wield the Eternal Blade, and break the curse. After ten years hiding in the Forbidden Forest, Emerald sets out across the realm. But she's not alone in the race; the traitor Kage is hunting the same gemstones, and if she gets there first, Khaonai and all his darkness are unleashed on the world. Good thing Emerald has never been great at following orders.