These kinds of monsters are totally cliche, but even as a veteran horror fan and late-30s male, this one still creeped me the fuck out. Anyone else?
Supposedly Valak first appears in The Lesser Key of Solomon: https://allthatsinteresting.com/valak
Solomon features King Solomon of Old Testament fame who was renowned for his wisdom. At some point around the second century B.C., the idea spread that the king’s realm of knowledge had also included certain secrets of astrology and magic. The grimoire bearing his name lists the 72 demons that the king supposedly vanquished during his reign, providing readers with their names and instructions for expelling them should they come in contact with such spirits themselves.
Valak, which is sometimes also spelled Ualac, Valu, Volac, Doolas or Volach, is the 62nd spirit listed in Solomon, according to which he “appeareth like a boy with angels wings, riding on a two-headed dragon.” His special power, according to the text, is finding snakes and hidden treasures while leading an army of 30 demons.
I don’t believe in any of that and I’m not at all religious, but it’s creepy and interesting to me anyway!