Responses
Es fiction (๑•ㅂ•)و✧
I believe the issue is the power has been declining for so long, only rare members if the clan has it. Iku's mother was strong enough to hide it and now she was born, Iku regained what the clan has lost because she was born from a man not of the clan. It's a theory but makes sense.
considering the level of inbreeding going on in that village, these ppl should definitely have way more medical issues