Un Alma De Ceniza Y Sangre - Jennifer L. Arment... Link

A Soul of Ash and Blood

A mortal woman cursed to be reborn with no memory of her past lives is hunted by an immortal king who has loved and murdered her across a thousand lifetimes—until she awakens remembering everything.

Liora discovers Seris’s spirit and learns the truth: Cazriel didn't just kill her. He chose her each time. Because in the first life, before the curses, they were mortal enemies who fell in love. She was a priestess of the sun; he was a warlord of the night. They tried to unite their people, but the gods feared unity. So they cursed them to this cycle: one must die for the other to rule. Liora makes a radical decision—to offer her blood willingly, but not to kill her. She forges a new ritual: a soul of ash and blood , where ash represents death and blood represents life. Together, they burn away the old curse.