"Well, however you did it, I am glad that you did," Escobert says, "It's been surprisingly quiet the last little while."
You look over the field and see that the group of raiders that was amassing has grown much larger. From the darkness, a creature strides into the dim light of the dying fires around the keep. Although it is shaped like a human, it is at least 7 feet tall, its skin is covered in blue scales, its fingers bear wicked claws, and its face has the muzzle and reptilian eyes of a dragon. The creature stops about 80 yards from the main gate of the keep and scans the walls. A line of kobolds fans out behind it. With their spears, they prod four human prisoners into the dim light. You can make out a woman, a teenage boy in a blood-soaked tunic, and two children. The the half-dragon hails the keep.
"Defenders of Greenest! This has been a successful night, and I am feeling generous. Do you see these four pitiful, useless prisoners? We have no need for them, so I will trade them back to you. Send out your best warrior to fight me, and you can have these four in exchange."
From further down the wall, you hear a man shout, "Elda! Let go of me you bastards, he has my sister!" Looking that way, you see a man in chain mail straining against a couple of others, trying to head toward the doors to the keep.
"Don't be a fool, Markguth, he'll cut you down right in front of their eyes!" another shouts back at him.
Moments later, you see Governor Nighthill hurrying down the wall toward you. Stopping in front of you, he takes a moment to catch his breath, "My friends, you've demonstrated your prowess all through this frightful night. I realize this is an awful burden to ask you to bear, but any of you has a better chance to defeat that horror than my militia have."