b'Boomer \n'b'  Medium   plant ,  unaligned  \n'b'  Armor Class  7 (natural armor) \n'b' Hit Points  22 (4d8 + 4) \n'b' Speed  0 ft.\n'b' STATS STR: 1 (-5) DEX:  1 (-5)  CON:  12 (+1)  INT:  1 (-5)  WIS:  3 (-4)  CHA:  1 (-5)  \n'b'\n'b'\n'b'\n'b'\n'b'\n'b'\n'b'  Damage Immunities  thunder \n'b' Condition  Immunities blinded, deafened, frightened \n'b' Senses  blindsight 30 ft. (blind beyond this radius), passive  Perception  6 \n'b' Languages  \xe2\x80\x93 \n'b' Challenge  1/2 (100 XP) \n'b' SPECIAL TRAITS \n'b'\n'b'  Deafening Boom . When a creature hits the boomer with a  melee attack , the boomer releases a blast of sound. Each creature within 10 feet of the boomer that can hear it must make a DC 12  Constitution  saving throw. On a failure, a creature takes 5 (2d4) thunder damage and is  incapacitated  until the end of its next turn. On a success, a creature takes half the damage and isn\xe2\x80\x99t  incapacitated . \n'b'  Death Burst . When it dies, the boomer explodes in a cacophonous burst. Each creature within 30 feet of the boomer that can hear it must make a DC 12  Constitution  saving throw. On a failure, a creature takes 7 (2d6) thunder damage and is  deafened  for 1 minute. On a success, a creature takes half the damage and isn\xe2\x80\x99t  deafened . \n'b'  False Appearance . While the boomer remains motionless, it is indistinguishable from an ordinary fungus. \n'b'\n'b' REACTIONS \n'b'\n'b'  Shriek . If bright light or a creature is within 30 feet of the boomer, it emits a shriek audible within 300 feet of it. The boomer continues to shriek until the disturbance moves out of range and for 1d4 of the boomer\xe2\x80\x99s turns afterward. \n'b'\n'b' ABOUT \n'b' An ear-piercing shriek echoes in the cavern. The sound comes from a human-sized mushroom whose stalk steadily swells with air as it shrieks. \n'b'  Thunderous Shriek . Boomers are a subspecies of shrieker, nearly indistinguishable from their more innocuous cousins. When shrieking, however, the stalk of the boomer noticeably expands, swelling with air until it releases the air in a thunderous burst of noise. Like its more common relative, it is often deliberately cultivated by intelligent subterranean races as a defensive measure against intruders.'