The Master is Satan. Just as Christians worship a spiritual being called God, Satanic worshippers worship Satan. There are spells and incantations that can call evil spirits into life form. But the Master does not have to take on a human form to be worshipped.
How many times has Q said this is good vs evil and to pray. This is, in the end, going to be a spiritual battle. The Holy Bible foretells of this battle. Are we really in the final days? IDK. Having a hard time wrapping my head around it.