Six white tomes, Encased in bone.
They shine in light like polished stone.
Trapped deep inside, fel beasts reside.
Dark power; to the holder, the books provide.
In lakes, submersed, and tombs accursed.
Across the land they are disbursed.
A slightly worn looking, and rather thin book. Its cover is red, but also holds some inset jewels, and the words “Eventful Evenings with Magic” written on the cover in gold leaf. While not a misnomer, it is interestingly deceptive.
You find a patch of edible funghi. They taste well and all, no ill effects. UNLESS you consume some beverage, even 3 (three) days after eating it. Then you become really sick with pains, vomiting, all the fancy stuff. As a gift or good meal, it could be a cruel joke or to make sure the heroes spend their time focused on the mission. And the fine soup you had in the inn yesterday could have some in.
(Inspired through a real-world fungus. Was really used to cure alcoholism.)