The Chronicles of Malus Darkblade vol 1 - Dan Abnett and Mike Lee

Aera Nightwing always dreamed of mastering her summoning powers, but at 22, she's little more than a novice–and to her family, little more than a vessel for future heirs. Overlooked, underestimated, and reduced to her ability to produce children, Aera has spent her life longing to prove herself. However, when her family is slaughtered, vengeance becomes her sole purpose, leading her to the one being she's been taught to fear above all: the Death-Breaker, a centuries old Necromancer and the King of the Dead.
Burdened by guilt for failing to protect her village, Meridiana, from its wicked rulers, Aera's world fractures further when the Death-Breaker spares her life, leaving her with the realization that the man she's been taught to hate, might not be her enemy at all. Beneath the canopy of the dark forest he rules, and the race against a prophecy seeking to take her life, Aera begins to uncover a labyrinth of lies surrounding her past, destroying everything she once knew.
In this gripping dark fantasy where even the light has claws, dark secrets, mythical creatures, and a kingdom teetering on the brink of ruin await. Will Aera find the strength to wield her wickedness in time, or will the shackles of her looming destiny take her life once and for all?