Okay, Geoffrey of Monmouth fans, what does this sound like?
“….Mordecai… a great man and among the first of the king’s court, had a dream… And this was his dream:
“Behold, there were voices, and tumults, and thunders, and earthquakes, and a disturbance upon the earth.
“And behold, two great dragons came forth ready to fight one against another. And at their cry all nations were stirred up to fight against the nation of the just. And that was a day of darkness and danger, of tribulation and distress, and great fear upon the earth.
“And the nation of the just was troubled fearing their own evils, and was prepared for death. And they cried to God, and as they were crying, a little fountain grew into a very great river, and abounded into many waters. The light and the sun rose up, and the humble were exalted, and they devoured the glorious.
“And when Mordecai had seen this, and arose out of his bed, he was thinking what God would do; and he kept it fixed in his mind, desirous to know what the dream should signify.” (Esther 11:2-12)
And here’s Merlin and King Vortigern, in Regum Historia Britanniae, Bk. 2, chapter 3:
“As Vortigern, king of the Britons, was sitting upon the bank of the drained pond, two dragons… came forth, and approaching each other, began a terrible fight… After this battle of the dragons, the king commanded Ambrosius Merlin to tell him what it portended. Upon which, bursting into tears, he delivered what his prophetical spirit suggested to him….”
Most versions of the story make a big point of mentioning how big a racket the dragons were making.
In the History of the Kings of Britain, Merlin acts an awful lot like Joseph and Daniel and Solomon, and not much at all like a pagan druid. This is why it’s explicitly said that Vortigern and his advisors thought Merlin’s prophecies (which appear later in Book II at the request of the Bishop of Lincoln, and try hard to sound like the Book of Revelation processed through Welsh poetry) were based on “divine inspiration.”
These Biblical references are something that was more obvious to people in the past than to us, because we aren’t as big of Bible readers, or because our favorite books are different from theirs.