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’t incapacitated.
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 deafenedfor 1 minute. On a success, a creature takes half the damage and isn’t deafened.
False Appearance. While the boomer remains motionless, it is indistinguishable from an ordinary fungus.
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’s turns afterward.
Description
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.
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