This is a list of submissions that I find different, odd, strange and fantastic.
The Poison Eaters Tribe dwells deep in the jungle glades of the Ushaika, in the lowest reaches of the undergrowth where no sunlight pierces through the leaves, and where the marshy ground wells up with tea-colored water at the lightest step.
Send in the clowns.
Your adventurers can name this one, if they survive. The last thing they will hear is: “ppppooockt-t-t-t-t-t-t-t-t-t” before their eyes and ears start bleeding and their body become black and blue… battered by something unseen and untouched.
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.)