Fafnir (Marvel Comics) entities is stopped when Thor agrees to go to Hel's realm willingly. Fafnir later reappears in the 2011 limited series "Avengers Prime" in the aftermath of the "Siege" storyline as, at first, an adversary then ally of Thor, Tony Stark and Steve Rogers with several legions of ogres and elves in battle against a Twilight Sword wielding Hela and her army. Fafnir was originally a normal man until transformed by the properties of a magical pool into a large dragon. Fafnir retains his intellect and speech, possesses superhuman strength and durability, and the ability to breathe fire and cast illusions.
Germanic peoples sake of royal succession. Imperial policy had to be carefully charted between the Roman-Germanic claimants to kingship and the maintenance of Roman imperial administration, as the federated Germanic kings attempted to put their stamp on Roman rule and replace Roman armies with their own warriors. Roman leaders were not oblivious to the clever tactics (intermarriage and offspring) employed by Germanic chieftains and adopted creative treaties to either appease them or temper their ambitions. Prior to the Middle Ages, Germanic peoples followed what is now referred to as Germanic paganism: "a system of interlocking and closely interrelated religious worldviews and practices