The Miasmagaster is a strange creature, frequently found in subterranean environments. Bearing features reminiscent of mollusks, crustaceans, and insects, Miasmagasters are predatory creatures that wander the Underdark in search of prey. Somewhat affable and charming, they will gladly stoop to trickery in an attempt to ensnare suitable prey.
Despite formidable claws and mandibles, Miasmagasters are probably best known for the noxious stench that follows them. It is more than capable of quickly incapacitating prey with these fumes, and the stench of Miasmagaster spawnlings is even toxic enough to affect humanoids several times their size.
The following Miasmagaster is suggestive of a typical specimen. When diplomacy fails, the creature will exude its stench by using Miasma, and then will use Flurry of Blows to antagonize potential prey, using Miasma whenever it recharges. Intelligent creatures, Miasmagasters will gladly flee from stronger prey.