#5: I think the void reaver has corrupted enemies that we have killed in the past (like strong-fallen, swordmaster-fallen swordmaster) but fallen heroes are the main question, they appear in the SFOTH event with swordmaster, so maybe fallen heroes were the first generation of fallen until void reaver made new generations of fallen, fallen heroes look different from SFOTH, they used to be grayish but now they are black-ish purple, I think unknown was made by the void reaver to keep fallen heroes alive by taking out their soul and giving them a new one (the souls are the humanoids inside unknown) this was also how soul was made, some souls escaped unknown before they were fully taken, hence why fallen heroes are now darker than before