Cold-Forged Flame by Marie Brennan (2016)Read about the other entries on the list.
The swordswoman finds herself in the warrior’s version of the actor’s nightmare, with no idea who or what she might be, despite which she is magically compelled to perform an arduous quest for reasons unclear. The one certainty: she must collect blood from the cauldron of the Lhian. Who this Lhian might be and what views they might have about blood being collected from their cauldron—both are unknown. The revelation that most of the people who try to win a prize from the Lhian never return is cold comfort.
--Marshal Zeringue