(Try not to trip over yourself)
The Saga of Bosi and Herraud is a Norse legendary saga that mainly takes place in Götaland (modern day southern Sweden) and was written sometime before 1350 AD. It ties into other sagas as well - for example, the story of Ragnar Lothbrok, recently known as this guy from the History Channel:
The central bromance to the story is between Herraud, the heir to the throne with minor daddy issues (since his bastard brother gets all of the affections of King Hring); and Bosi, the daredevil love child of a former Viking raider and a crippled shield-maiden (yup). These two hit it off like a house on fire, and when Bosi kills and maims a couple of people in a friendly ball game (happens between friends) and gets himself exiled, Herraud decides to go with him.
After five years of leisurely plunder the foster-brothers return home, and Bosi does his buddy a favor by killing the (agreeably annoying) bastard brother. At first the king wants to have both of them executed, but he can't bring himself to give the death order of his own heir, so he takes a page from fairy tales and decides to give them an impossible task instead, sending them off to bring him a vulture's egg inscribed with golden letters.
The saga features two epic battles:
1. Bosi and Herraud versus Giant Vulture Monster and Troll Priestess (In which there is a generous amount of stabbing, slipping on blood, losing body parts and rolling around on the floor)
2. Bosi and Herraud versus People Whose Daughter/Sister They Had Kidnapped Along The Way (In which there is a sea battle where people transform at random into dragons, boars, and wolfhounds, and jump from ship to ship. Also, Herraud gets his nipples torn off. Ick.)
The Absolute Undisputed Best Moment of the Saga,
however, is the afterword: Once every battle is won and the adventures are over, Herraud and Bosi both become kings and start their own families. Herraud has a little daughter, Thora (who will later become the first wife of Ragnar, sadly not mentioned in the TV show). The magical vulture egg decides to hatch and produces a small, gold-colored baby dragon. The king gives the baby dragon to Thora as a teething toy.
Think about it.
A princess. Teething. On a dragon.