Things are going well for King Arthur for once. He’s in complete control over the island of Great Britain, he’s got a bunch of awesome knights, and dragon attacks are down. What could go wrong?
King Arthur should know to never ever ask that question, because twelve men from the definitely not defunct and/or fictional Roman Empire are here to show him exactly what can go wrong, because the rent is due.
The creature this time is orphan bird, because when you can turn a bird that abandons her children into an religious allegory, why not?