Freaky Fungi

"The dwarf smiled hungrily as he eyed the mushroom. It wasn't a big, juicy slab of meat, but after days of starving, it would do. He pulled the fungus out of the ground, and opened his mouth wide, dropping it into his maw. Now, as the ghost look down upon the dead dwarf, he wished he had been more careful." -- Glug's Guide to the Underdark, Chapter 2, "Deadly fungi and how to identify them."

Luurden

Luurden, or bloodfruit, is a rare tree that grows only in areas of strong faerzress. The barren branches of this pale, gnarled tree seem more dead than alive, but once every 3 to 4 years, it produces a small amount of bitter red fruit that is used to make rare Underdark wines and elixirs.

Sussur

Rare and magical, the so-called "deeproot" tree is found only in the largest of caverns. It can grow to a height of sixty feet, and its branches are long and gnarled, with banyanlike aerial roots. Few leaves grow on the Sussur; it exists almost entirely on faerzress. A Sussur tree can drink in magic from its environs, so most Sussurs are surrounded by antimagic fields that extend for hundreds of feet.

Megamind

When eaten, for one hour, this mushroom raises a creature's Intelligence score to 20, and grants it telepathy out to 10 feet. However, when the eater of the megamind speaks, others find their words too advanced to understand, hearing nothing more than unintelligible gibberish. The eater of the megamind can understand himself perfectly fine, however.

Pigwort

When eaten, this mushroom that resembles a pig nose causes numerous warts to cover the creature’s body, imposing disadvantage all Charisma checks that aren't to intimidate someone. Every 24 hours, the creature must succeed on a DC 13 Constitution saving throw. If the creature fails three times, it is transformed into a pig. The effects of pigwort can be cured with any effect that cures poison, but if the creature is turned into a pig it can only be turned back with a Lesser Restoration spell or greater magic.

Sourtongue

When eaten, for one day, this mushroom causes a creature’s tongue to swell and become green in color. Everything the creature eats for that day tastes sour, and it has a hard time speaking due to its swollen tongue.

Unbrella Shroom

This tall, umbrella-shaped mushroom constantly drips water from the bottom of its cap, almost like rain. By spending one hour by the unbrella shroom, a creature can gain up to three water rations.

Troglodyte's Perfume

This moss is infamous for its rancid odor reminiscent of the smell of a troglodyte, which got it its name. Any creature other than a Troglodyte that starts its turn within 5 feet of a patch of troglodyte’s Perfume must succeed on a DC 12 Constitution saving throw or be poisoned until the start of the creature's next turn.

Laughing Stalk

This small mushroom with a cap that resembles a smiley face has spores that act as laughing gas. Any creature that starts its turn within 5 feet of a laughing stalk must succeed on a DC 13 Constitution saving throw or become under the affects of a Tasha’s Hideous Laughter spell.

Blightmare

This rare, black mushroom is known for the mind-affecting properties of its spores, which are often harvested by Underdark races to unleash upon their enemies. A creature that inhales the spores of a Blightmare must succeed on a DC 15 Constitution saving throw or become under the affects of a Phantasmal Killer spell. A Blightmare that is damaged or uprooted automatically shoots its spores out into the air, every space within 5 feet becomes filled with its spores for 1 minute.

Tanglemoss

Whenever a creature steps on this sickly yellow moss it must succeed on a DC 14 Strength saving throw or be restrained by the tanglemoss. An area encompassed by tanglemoss is considered difficult terrain.

Sea Puff

Sea Puffs are to the Underdark what water lilies are to the surface. When touched, a sea puff explodes in a puff of spores, leaving behind the pleasant smell of roses.

Rowcap

This water-resistant, tough mushroom grows on the shores of Underdark lakes, oceans and rivers. Its name comes from its large cap, which is often cut off and used as a makeshift raft by Underdark races that don’t have access to boats.

Mushmallow

These soft, chewy, white, cylinder shaped shrooms are in almost every way like marshmallows of the surface world.

Shroomlight

This star-shaped fungus grows on cavern ceilings, emitting a soft glow like moonlight. It sheds dim light in a 10 foot radius.

Nighty-Night

This large blue mushroom has a cap shaped like a nightcap, light blue moons dotting it. The of a nighty-night spores, when inhaled, force a creature to succeed on a DC 11 Constitution saving throw or fall asleep.