Detect Sentience. The brain mushroom can sense the presence and location of any creature within 300 feet of it that has an Intelligence of 3 or higher, regardless of interposing barriers, unless the creature is protected by a mind blank spell.
Distress Spores. When the brain mushroom feels threatened, all other fungi within 120 feet of it become aware of the threat.
False Appearance. While the brain mushroom remains motionless, it is indistinguishable from an ordinary brain
Slam. Melee Weapon Attack: -3 to hit, reach 5ft., one target. Hit: 1 bludgeoning damage.
Mind Blast (Recharge 5-6). The brain mushroom magically emits psychic energy in a 30-foot cone. Each creature in that area must succeed on a DC 11 Intelligence saving throw or take 9 (2d8) psychic damage.
Description
This peculiar fungus has fruiting body that quite closely resembles a disembodied brain with a brain stem, which is in fact its stalk. It can drag itself with the stalk or roll to move. For reasons unknown, the brain mushroom has some degree of psionic power that allows it to detect the minds of sentient creatures in its vicinity. When it detects what it perceives as a threat, it releases a cloud of spores to alert its neighbouring fungi. Myconids often use brain mushrooms as a silent alarm to warn the fungal people of sentient threats the brain mushroom perceives. It is thought that the brain mushroom may be related to the mind flayers' intellect devourers.