A GRIM FAIRY TALE, by Robert Stirniman
Once upon a time the brave knights of the realm captured a
strange wizard of unidentified foreign origin - UFO. There were
no majic amulets or potions found with him, but he did have a
remarkable bottle with an unusual cap. During interrogation, the
wizard would say little, except that the bottle contained powerful,
and possibly dangerous majic, and should probably never be opened.