The intro begins in past-tense in order to make it clear that there's no retroactively affecting the setup.
Just as the sky was beginning to turn crimson, and the familiar twilight calls came from the forest, those who had remained ready outside the perimeter ran into the Shrinehouse, loudly announcing to all in the stone-reinforced longhouse that a small party of messengers were arriving. Those in the Shrinehouse left, and as they walked towards the Eastern entrance, they were joined by the rest of the village.
The village is protected on the south by the sea, and on the west by the river Kall. A long wooden palisade runs from river to sea in an arc, easy passage only available at the entrance, or along the coast at low tide. It is at this entrance that a band of warriors presented themselves, brandishing a large banner as they did so.
The five warriors walked up to the village, each dressed in padded jackets thick enough to beat the coming Winter's cold and reinforced with small studs and loops of metal. Two carried spears and waited outside Kallbacken; the remaining three bore swords at their waists, and entered with their banner held high enough for all to see. The warriors' features were of similar descent to the citizens of Kallbacken, close enough that they may have come from the next village over, but their style of dress was more foreign. Instead of long, looped, belts and woodland colours, the interlopers wore thick, unembellished belts, and they were covered in cloaks of a yellow hem.
Their banner was far stranger. The standard stood over ten feet tall, and the banner was at least half that length. On it was no heraldric sign, but instead a detailed tapestry depicting an odd scene. A Tower of black stone, with a vertical, slitted eye at its zenith, which seemed to look back at anyone who saw it. Four people, in bedraggled rags, were depicted falling from the top of the tower, apparently frozen midair by the embroiderer's hand.
She pronounces, in a clear voice, "Hear me, people of this village. The Tower has cast its eye upon this land, and it thinks it good. Its will is that all here are spared. It is willing to be merciful in this. Its will is that all here worship it, and its brethren. It will not be denied in this. People of this village, I leave this, the Banner of the Tower. When we return, as the sun sets tomorrow, each and every one of you must bow before your new master. The Tower demands your worship. It will be merciful in this. If any of you refuse, they must be expelled from the village, or they will be put to the sword. Understand, you are at The Tower's mercy. Your village will fall if you do not worship. If you do, then you will be well treated. You will become one of us. Our blood, our sweat, and our souls will be the stone that builds the foundation of the new world. The new world will be ours."
With this, the three of them leave, taking pains not to fully turn their backs on the gathered crowd. The large banner stands still where it was placed. At the entrance, they are joined by their allies, and the group of strangers begins to walk back through the woods to the east.
As the villagefolk lose sight of the messengers, murmurs and whispers start to run through the crowd.
Winter's Third Bite, please roll Perception (as Observation) vs Ob 4 with your post. There's something spirit-related you might hear.