Izyda

As for me, Eul Tae as Bulgasal started to change and slowly lost himself and began to change into Hwal. As a human being, Hwal began to feel a bond and attachment to people, which allowed him to understand the behavior of Sang Un, whom he did not trust and was afraid of abandoning him.

I just realized that after Hwal died, Eul Tae found Sang Un and that's when he fell in love with her. She was waiting for Hwal's rebirth all the time and probably Eul Tae became jealous.

This may be true, because those 1000 years must have left their mark on him, he wanted to live so much that he sacrificed his own humanity and his own family. He could not turn Hwal into Bulgasal, therefore he cannot reborn as a human and he is in constant pain.

It seems that Sang Un killed Hwal because she thought he killed her foster children and Hwal thought that Sang Un killed his family. Did Eul Tae kill her children too? I hope it wasn't Hwal. Or maybe Eul Tae used the same idea twice, he killed Sang Un's children and told Hwal that the villagers did it, and Sang Un said that Hwal did it?

I think Sang Un had a twin sister in order not to remember her past. This procedure was to solve the mystery; what really happened in their past, and arouse Hwal's curiosity about why Sang Un has no scar. This would lead to their meeting and the discovery of the past, which was modified by Eul Tae, who probably stirred up Hwal and told him that Sang Un no longer loved him and would leave him for the people.

Yes, that's a very good summary. It turns out that Sang Un killed Hwal in the past because she couldn't calm him down. This situation was taken advantage of by Eul Tae, who, as he said in episode 12, always wanted to be like Hwal and despite the fact that he was born into a noble family, he had to die at an early age. The dying Hwal took the soul of Eul Tae to become a human and seek out Sang Un, with whom he was in love. Eul Tae was supposed to turn him into Bulgasal but he took advantage of the situation again and did everything to make him hate Sang Un. I agree with you that Eul Tae knows that to be a true Bulgasal he must have Hwal on his side. Because there must be two Bulgasal in order for one to watch over the other. Like Sang Un, she guarded Hwal and held back his animal nature. Two Bulgasal complement each other. So to become full Bulgasal Eul Tae has to kill his own soul several times to cease to exist then become immortal?

Yes, because he was dying, he wanted to be a half-Bulgasal in order to save himself, therefore he killed his brother (maybe it was not his biological brother at all) and put the blame on Sang Un.

That distrust and maybe a little fear of what really happened in the past was shaken by Eul Tae who wanted to separate them. He probably knew he could become half Bulgasal, but one of them could transform him, and neither of them wanted to do this, so he pulled them apart from each other.

Could it be that DH was the newborn baby hold on the hands by he little girl in the cave? Maybe Hwal and Sang Un were like parents to him? He must have known them, but why did he become bad? Did he wanted to be like them?

Probably yes. The question is was Sang Un Bulgasal or half Bulgasal?

And if Sang Un's curse wasn't a curse. She just thought Hwal had killed the villagers. And she gave him half of her soul so that he would become human and learn to love people as she loved them? She gave her life for him, maybe she defended him and wanted him to be reborn?

Wow, I just realized something. Dark Hole pulls a red thread from Shi Ho's hair. That would mean that they are meant for each other. They should be married.

We do not know this yet. But this slow-motion scene reminds me of every other scene in the Korean drama where lovers meet.

I guess it was them, because Dark Hole recognized them and found them. Plus, he killed them right after he remembered the scene of the heinous murder. He obliterates all the evidence and tries to forget his act.

It's simple, it was that married couple - the apples sellers, Dark Hole murdered them in the previous episode. Because witnesses must die in each reincarnation.

And I think Hwal will die. The end... :P

And now I can see that Hwal and Dark Hole are basically similar, because they both blame somebody for their misery, but they can't see that the fault is in themselves, and they trying to justify their actions.

Hwal really irritates me. He is wayward, stubborn and thinks he is right. He blames Sang Un for the death of his family, but who normally takes his wife and child to the habitat of the deadly enemy? He is so blinded by his own pride that he cannot even see the goodness in the people around him. Lust of revenge do not even allow him to come to terms with his lost family. I agree with Sang Woon from the past and I despise him too.

I think the guilt is eating him up, which is why he has this black hole in his heart. He suffers but refuses to accept his guilt and even rejects the thought that he might have done something so terrible. This is why he reacted so strong at Sang Woon's accusations.

And if the blindness was related to his death. His skull was shattered from the blows of a stone. He cannot see because his brother damaged his eyes and this is to remind him of this event so that he would never forget it.