Gloomshroom

Wondrous item, common
  These glistening teal toadstools are a common occurrence in The Low, bathing its myriad of twisting tunnels in dim, pulsing, green light. Gloomshrooms’ spore dispersal method has more in common with plants than it does fungi, and forms a symbiotic relationship with many of The Low’s denizens. Gloomshrooms grant herbivores that graze upon them improved darkvision, aiding the prey animal to spot dangerous predators and make a quick getaway. One short digestive journey later, and the gloomshrooms’ spores are deposited in a hearty pile of dung, or, if the herbivore wasn’t so lucky, a nutrient rich corpse.
  As an action a creature can eat this mushroom. For the next hour, it gains darkvision out to a range of 60 feet. If it already has darkvision, the range of this vision is extended by 30 feet.