[solved]
When i finished giving Dwiz and Dwar card i got into the room to kill the dragon. I got into the room and while killing the dragon i got DC'd because of my internet connection. When i got back to the game and entered the room again the "Dragon was Gone". Unfortunately, I was stuck in this quest because the dragon was gone the King is always telling me the dragon was not killed yet but the dragon is not in the room.
PLS~ Help.