This Wicked Fate by Kalynn Bayron

THE BREATHTAKING SEQUEL TO THIS POISON HEART
 
Briseis's mother is dead, but there is one chance to bring her back: find the last piece of the deadly Absyrtus Heart. If Bri is to locate the missing piece, she must turn to the blood relatives she's never known, learn of their secret powers and take her place in their ancient lineage.

But Bri is not the only one who wants the Heart, and her enemies will stop at nothing to fulfil their own ruthless plans. Strengthened by the sisterhood of ancient magic, can she harness her power to save the people she loves most?  Kalynn Bayron, bestselling author of Cinderella is Dead and This Poison Heart, returns with the second and final book in this stunning, empowering and inclusive fantasy duology.