Obliviax

Obliviax, also known as oblivion moss, was a dangerous variety of moss. An alternative name coined by adventurers, memory moss, was derived from the fact that this plant preyed upon the memories of other creatures. Obliviax while not common is said to be found in the jungles and marshes.
This variety of moss has an average degree of intelligence. They harbor an innate hatred of mobile creatures, making them always aligned towards neutral evil.
This moss grows in small thick patches, measuring around 4 feet (1.2 meters) in length and weighing around 1 lb (0.45 kg). These are reminiscent of a sort of luxurious carpet, the color of tar or pitch. Leaves and flowers grow on them that are of a similar hue. A smell similar to damp, loamy earth emanate from them. When lacking memories, their bodies somewhat quiver.
The obliviax can sense the approach of any creature within 60 feet (18 meters) of them, as their whole bodies are a primitive form of sensory organ that could ascertain the location of other creatures by means of scent and vibration. A form of blindsight.
They uniquely possess the ability to steal the last twenty-four hours of memories from other intelligent creatures within that range. Through this ability they could even steal memorized spells. They prefer to steal the memories of any wizards present, followed by clerics, other forms of spellcasters, and then non-spellcasters.
This ability can not penetrate through lead surfaces. The victims of this memory stealing would act baffled and disoriented, having a blank space in their memories. Some scholars claimed that this loss of memory is somewhat temporary. Saying that specialized memories would not take long to return, more mundane ones would return after a few hours of rest, and a select few random ones could take weeks to return.
It was possible to regain the stolen memories by an obliviax by eating it, though there was chance of becoming very ill from doing so as the moss was somewhat poisonous. One could even gain the memories of other creatures and their memorized spells by eating an obliviax. However, these would fade from the mind after twenty-four hours. Destroying a patch of this moss would not return any stolen memories nor would eating a mossling. Some claimed that if a victim destroyed a mossling before they ate its parent patch, then the stolen memories could not be regained outside of a wish or miracle spell. Though others who have encountered these creatures claim otherwise.
This moss could be distilled into a potion of forgetfulness. By contrast, their spores could be distilled into an elixir that would restore the memories of the forgetful or senile.