Here's a random room for a dungeon:
Fountain of Restoration
This small room (10' x 10') has a fountain in the center. The fountain is a cleric healing a wounded warrior woman lying on the ground, with water pouring from the wounded woman's mouth. Characters that drink from the fountain recover all levels and ability points lost due to undead draining.
If the water is taken from the room, it becomes poisonous. Anyone who drinks the water after it has left the room must Save vs. Poison or permanently lose one point of Strength. If they try returning to the fountain to recover this lost point of Strength, it will not work, because the fountain only repairs losses due to undead.