Whisperbubble Mire
This bog does not explode or bite. It lies, drifts, and whispers through bubbles. When the muck pops, a creature close enough inhales a shimmering vapor that bends sight and sound. For a moment, allies seem to become strangers, reeds become grasping hands, and open ground looks like deep water. The hazard is most dangerous when creatures panic and split up, but careful movement and quick grounding checks can shake off its influence.
Whisperbubble Mire
Defenses
Detection
“A black-green swamp basin dotted with glossy bubbles that rise from the muck, swell like fish eyes, then pop with a wet whisper. Each burst releases a sweet, rotten perfume and a brief shimmer in the air, as if the reeds are bending in a heat haze.”
Standard Engagement
A creature enters or starts its turn within 10 feet of the bubbling muck, or a creature disturbs the surface with loud movement, thrown objects, or combat.
At the start of each round, the mire bubbles in any occupied 10-foot square of the hazard area. Each creature of the hazard's choice within 10 feet of that square must attempt the Constitution saving throw. The hazard favors creatures that linger, make loud noise, or stomp the ground, and it becomes more active in crowded combat.
The hazard resets after 1 minute of undisturbed bubbling. Strong wind, heavy rainfall, or flooding can suppress it for 10 minutes.
When a creature starts its turn within 10 feet of the bubbling muck or enters the area for the first time on a turn, it must succeed on a DC 13 Constitution saving throw or inhale the hallucinating vapor. On a failed save, the creature is disoriented for 1 minute. While disoriented, it has disadvantage on Wisdom (Perception) checks, and the first attack roll it makes before the end of its next turn is made with disadvantage as well.
If a creature fails the saving throw by 5 or more, it also sees a false threat until the end of its next turn. The creature cannot take reactions and must immediately use 5 feet of its movement, if able, to move away from the apparent danger, such as a phantom monster, collapsing ground, or imagined ambush.
A creature affected by the hazard can repeat the DC 13 Wisdom saving throw at the end of each of its turns. On a success, the hallucinations end early. Otherwise, they end after 1 minute.
Bright sunlight, strong magical illumination, or a successful DC 13 Wisdom (Insight) check made to steady oneself can grant advantage on the next saving throw against this hazard, as the creature focuses on what is real.
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