Eternal Ones - Gilded series
Eternal Ones by Namina Forna

Wow. You know it was a good book when you get to the end and are just left sitting there still savouring everything that happened, not yet ready to return to the real world.

Following the tumultuous events of The Merciless Ones (no spoilers here in case you haven’t read it yet), Deka and White Hands have split up in the quest to find Deka’s kelai the source of her divinity so that she can ascend as a God and slay the Oteran pantheon of gods who are so desperate to hold onto their power, they are bleeding Otera dry. Alongside the fierce fighting on the battlefields, Deka has her own internal struggle as she wrestles with the decision she must ultimately make. By becoming a god eternal, she saves the world but will lose her friends and her true love Keita.