The longboat shifts noiselessly over the waves. Its hull is black against the white mist which wreathes the lake with its wraithlike tendrils. The villagers gaze on in awe as it emerges from the veil.
There is no one aboard, no explanation for its arrival, no maps from which to glean its history.
Upon exploration of its creaking timbers, there are no sailors aboard. And yet, when the explorers come back on deck again, they find themselves far from the shore, moving slowly away from their village, into the mist-hidden sea.
* The ship is enchanted to lure people to somewhere, either to act as slaves, or as food, or as rescuers.
* The ship is sentient. The havens where it was built are under attack and it wants to bring reinforcements.
* The ship is a gift from the god of exploration, who is giving the villagers an opportunity to find new fertile lands…