Emerald Dust. If killed (whether in solid or gaseous form), the body of a green bulette appears to implode out of existence with a thump and inward rush of air. If the immediate area is searched, it is found to be lightly dusted in a fine green powder of emerald dust, which can be collected and used to create both potent poisons and poison-based magics.

Gaseous Form. While in gaseous form, the bulette can occupy another creature’s space and vice versa. In addition, if air can pass through a space, the bulette can pass through it without squeezing.

Gone With the Wind. If a green bulette is reduced to 50% of its hit points, it disperes itself to the winds and escapes, regathering itself at a later time to rest and heal.

Magic Resistance. The bulette has advantage on saving throws against spells and other magical effects.

Multi-State Existence. While appearing as a solid, animal-based creature when stalking or resting, the green bulette instinctively shifts as a reaction into a poisonous gaseous form when attacked, appearing as a roiling cloud of green-tinged smoke with glittering emerald particles floating within it. The green bulette will maintain its gaseous form and use it to attack, attempting to poison and choke its adversaries. It will only revert to its solid state again once it is safe and free from attack.

Planar Connection. Because their arcane natures tie green bulettes to the Elemental Plane of Air, they also simultaneously exist there as insubstantial and barely visible vaporous apparitions.

Actions

Bite. Melee Weapon Attack: +10 to hit, reach 5 ft., one target. Hit: 24 (3d12 + 5) piercing damage.

Creeping Death. While it is in gaseous form, one creature in the bulette’s space must make a DC 17 Constitution saving throw, taking 35 (10d6) poison damage on a failed save, or half as much damage on a successful one.

State Change. As an action, the bulette can transform from its solid form into a cloud of poisonous gas that is 10 feet square.

huge

monstrosity

cr13

tome-of-horrors

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