Song of the Fallen - The God Slayer Chroncicles, #1

War rages between the gods, throwing the world into chaos. Only one hero can restore balance - but she is just a simple farm girl named Eko. When a mysterious crystal calls out to Eko on her 16th birthday, strange dreams and unsettling visions plague her sleep. An encounter with the enigmatic goddess Kismet reveals Eko's destiny: she is the God Slayer, prophesied to end the celestial war and save humanity.
But Eko has no idea how to fulfill this prophecy. Sent on a quest to find answers, she is accompanied by the stoic knight Thane Grimsson and mysterious strangers with powers beyond her understanding. Pursued by vengeful gods at every turn, Eko struggles to unlock her own latent abilities while piecing together the secrets of her destiny. As Eko travels across the war-torn land of Etherea, she begins to understand the pivotal role she must play.
But malevolent forces are closing in, and even those she trusts may be hiding sinister agendas. To restore balance to the realm, Eko must defeat the sinister Scion of Discord and uncover the mystery of the Aetherial Heart.