The twist is certainly interesting and deserving of further detailing. There could really be more information on this witch and why she bears sucha grudge against said villagers that she is willing to turn their children into livestock and then have them returned.
I dont know that the troll is that important to the story since a foul tempered outlaw, or village pariah would do equally well in the instance of a courier since a troll is likely to attract undo attention. More background, more details, and perhaps a plot hook on how the PCs could be drawn into this rather than killing the troll and 'stumbling' onto the secret.
I bet the final version of this scenario was fun to play, it seems like a good idea. Sure it borrows heavily from a certain scenario from a certain computer game (Icewind Dale 2 was it?) ;) but I like it anyhow, it has been altered sufficiently to not resemble the game too much. Other than that, I agree with the others. Go to Comment
While travelling near the edge of a forest the air is filled with the wailing of battle horns. Soon a large group of mounted cavalry will gallop by in a panicked rush. Some will spot the party and shout "Flee! Flee for your very lives!"
Several minutes later, hundreds of running infantrymen will be spotted. A large group of white clad knights fiercely chanting a battle song is in full pursuit. One of the white knights carries a banner of a white horse on a black background. The horse is rearing under a gold crown, indicating the presence of the Paladin Prince. As the horrified infantrymen struggle to flee into the forest, the zealots charge into their midst and cut them down by the tens and hundreds.