False Appearance. While the shrieker remains motionless, it is indistinguishable from an ordinary fungus.
Shriek. When bright light or a creature is within 30 feet of the shrieker, it emits a shriek audible within 300 feet of it. The shrieker continues to shriek until the disturbance moves out of range and for 1d4 of the shrieker's turns afterward.
With its sky of jagged stone and perpetual night, the Underdark is home to all manner of fungi. Taking the place of plants in the subterranean realm, fungi are vital to the survival of many underground species, providing nourishment and shelter in the unforgiving darkness.