Three-headed Dragon

The Three-headed Dragon was a dragon that began ravaging the kingdoms across the continent of Serenia during the reign of King Graham of Daventry. The news of its path of destruction towards the kingdom of Daventry brought fear to land.

Soon it brought its destruction to Daventry. The people of the other lands put up walls surrounding Daventry to contain the dragon there and while those walls saved many lands it amplified the destruction inside of the kingdom. At the suggestion of Gerwain and by the demands of the dragon itself, a maiden was sacrificed to the dragon each year. Ultimately Graham was forced to send Rosella to be sacrificed to the dragon (despite the guilt he felt). She bravely went knowing her death may have saved the kingdom. She was taken to the land of the clouds above Daventry and was tied to a pole to await the coming of the dragon.

Gwydion a young slave boy escaped the clutches of the evil wizard Manannan in Llewdor learned from an oracle that he was the son of royal family of Daventry, and that his sister was to be offered as a sacrifice to the dragon. After crossing the sea to the continent of Daventry, and making his way over the mountains, he finally reached the kingdom of Daventry and rescued the maiden just as the dragon was about to consume her. He cast the Storm Brew spell, the lightning of the storm struck the dragon killing it.

Alexander wrote that the dragon was most likely under some ensorcellement. If it had been marauding on its own, it would have cindered Rosella quickly and moved on to new victims. It is still a mystery to all as to who set that particular dragon of fire to ravage Daventry, as it could neither have been Manannan or Mordack (though at least Manannan took joy from watching the dragon's destruction from afar).

Three-headed Dragon in the unofficial games
KQ2 (AGDI) suggests that the dragon was unleashed by The Father of the Black Cloak Society, as part of his curse on the kingdom. His ultimate aim being the crown of Daventry, but this is not made explicitly clear. The dragon could be as well only an unrelated event to them, which they saw as an opportunity in order to ask the crown from Graham. The dragon could also be a result of the curse, but not something specifically summoned by Morgeilen, but just one of many random "dire jeopardies" that were to befall the kingdom and bring misery to his family, before the coming of the second curse (Graham's heart attack).

It is also implied that the dragon began rampaging in Daventry almost as soon as Alexander had been kidnapped. Thus implying that at least seventeen maidens (including Rosella) had been offered to the dragon over the years.