'Ding! You have completed a quest: Protect the Giant Dragon! You have received the rewards: 50,000,000 Experience Points, 1,000 Military Points.'
'Ding! You have acquired an Item: Sacred Badge.'
'Ding! You have acquired the additional reward: +2 Levels!'
Well, it was unfortunate that the appearance of Angus had led to the demise of the great Green Dragon lady. She got killed by a single blow from Angus! However, the entire event was just an 'accidental event'. As a quest, the players did their best at making sure that Mathuven does not kill the Green Dragon. Angus appearing out of nowhere was just part of the 'necessary' drama.