The Toxicodendron Dafuqans is a biological mess created not by nature but by man. Consisting of random tendrils, four distinct types of leaf each poisonous to the touch, a poisonous sap that drips endlessly from its single flower, and a poisonous gas that is continually output by its single cone.
Declared an official Enemy of The Kingdom, Knights and citizens of Gruul have spent generations killing every one of the plants they come across in exchange for the significant bounty offered and still haven't made a dent in the population.
The plant doesn't reproduce naturally and each one had to be individually created, often displaying their graft lines across their entire lifetime, leading many to wonder what mad wizard spent their entire lives planting these across the kingdom.
(from day 16 of Mabs Drawlloween Club: Poison Plant)