Ok so I never read it but I did read spoilers on novelupdate a while back.
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Basically, Deon’s split personalities fuse, he finds out the truth about everything, lots of ppl die bc he enacts revenge & he dies by suicide. He has built up too much karma in his lifetime, so he’s sentenced to suffer in the afterlife. He finds out that his brother cruel is also suffering (bc all the bad things he did were to protect Deon) & begs to take on his brother’s karmic debt. They agree but Deon also has to give up his sight forever so that in later reincarnations, he’ll never be able to see ever again. And he still accepts so yeah he basically pays for all eternity when the duke was the one who caused misunderstandings (intercepting his parent’s letter to not draft him into the war bc they loved him and knew he was born weak). I also read some things in cruel’s pov and it’s so sad :( bc he cared about his brother so much

Idk why I torture myself in reading this when I know how the novel ends