The Pit in the Forest
In Claine Forest near Padduck Village there has appeared a pit. No-one knows where it came from¸ it just did. It is not so deep that you cannot see the bottom¸ but people fear it and avoid it. No-one who has climbed into it has come back¸ having been dragged beneath the surface by unseen hands.
A necromancer has come to the forest¸ seeking the pit. She does not quite know what she expects from it¸ but what she hopes for is protection from death.
Player-characters may wish to get involved¸ and thus this constitutes an adventure for old-school systems¸ for 5-6 PCs of 2nd level 2 or slightly fewer of 3rd. The PCs won't necessarily all die¸ and the players will almost certainly survive.