The Fantasy Review‘s list of 6 Captivating Dark Fantasy Book Series with Unique and Dark Magic Systems.
Malazan Book of the Fallen by Steven Erikson
From the blurb of book 1:
The Malazan Empire simmers with discontent, bled dry by interminable warfare, bitter infighting and bloody confrontations with the formidable Anomander Rake and his Tiste Andii, ancient and implacable sorcerers. Even the imperial legions, long inured to the bloodshed, yearn for some respite. Yet Empress Laseen’s rule remains absolute, enforced by her dread Claw assassins.…
Fallen Light by H.C. Newell
From the blurb of book 1:
This Child is not the chosen one. She is a demon to be destroyed.
Born of magic, Nerana is labeled a demon and forced into hiding by the Order of Saro. Living with a curse that binds her to their leader, Nerana seeks to free herself from their hold and soon learns that the path to redemption may prove more fatal than the Order itself….
The Shadow Campaigns series by Django Wexler
From the blurb of book 1:
Captain Marcus d’Ivoire, commander of one of the Vordanai empire’s colonial garrisons, was serving out his days in a sleepy, remote outpost—until a rebellion left him in charge of a demoralized force clinging to a small fortress at the edge of the desert.…
The Shadow and Bone Trilogy by Leigh Bardugo
From the blurb of book 1:
Soldier. Summoner. Saint. Orphaned and expendable, Alina Starkov is a soldier who knows she may not survive her first trek across the Shadow Fold―a swath of unnatural darkness crawling with monsters. But when her regiment is attacked, Alina unleashes dormant magic not even she knew she possessed.…
The Coldfire Trilogy by C.S. Friedman
From the blurb of book 1:
Over a millennium ago, Erna, a seismically active yet beautiful world was settled by colonists from far-distant Earth. But the seemingly habitable planet was fraught with perils no one could have foretold. The colonists found themselves caught in a desperate battle for survival against the fae, a terrifying natural force with the power to prey upon the human mind itself, drawing forth a person’s worst nightmare images or most treasured dreams and indiscriminately giving them life.…
Chronicles of the Black Company by Glen Cook
From the blurb of book 1:
Darkness wars with darkness as the hard-bitten men of the Black Company take their pay and do what they must. They bury their doubts with their dead.
Then comes the prophecy: The White Rose has been reborn, somewhere, to embody good once more…