Zuggtmoy or Tsuggtmoy is the Demon Queen of Fungi and „the dread and fell ruler of the 222nd ghastly layer of the Abyss“. Her symbol is a jawless skull with fungi blooming from within, though some of her cults use other symbols. For example, her cult in the Temple of Elemental Evil used the symbol of the Elder Elemental Eye.
As Lady of Fungi, Zuggtmoy looks like a huge puffball fungus on top of four elephantine legs. A mushroom-shaped head with sqashed and vage humanoid-like features resided atop her body. She could extrude pseudopodia from her bloated body to squash her opponents. Zuggtmoy can also appear as a feeble crown or a ravishingly-beautiful human woman. Other pictures show Zuggtmoy as a blue-skinned demonic female form with long shard claws, whose lower body consists of strands of fungoid matter.
Zuggtmoy is an ally of Iggwilv and Iuz and has been romantically linked to the latter. She is forced to share Shedaklah, the 222nd layer of the Abyss, with the demon lord Juiblex, who she constantly wars with for control over the entire layer. Her two chief allies are the demon lord Haagenti, Lord of Alchemy, whose minions are often seen in the forests of Shedaklah collecting ingredients for alchemical reagents, and the demon lord Demogorgon, with whom she often collaborates.
Also, called the Slime Pits, Shedaklah is a duo-layer: its surface is overrun by fungi and plant creatures while its underground is infested with oozes and slimes. Zuggtmoy claims the surface realm whereas Juiblex is confined to below ground. As a result of her setbacks in the past, Juiblex has managed to lay claim to parts of the surface realm. It was with the effort of Zuggtmoy’s lieutenant, Yibiyru, the Rancid Lady of Bitter Bale, that Juiblex didn’t conquer all of Shedaklah.
Zuggtmoy rules from the center of the layer in a palace that consists of two dozen or so gigantic mushrooms, each connected to the others by shelf-fungi, and each four miles tall. Numerous chambers and corridors have been carved within the mushrooms; it is said not even Zuggtmoy herself knows the full extend of the palace.
In other books, Zuggtmoy is revealed to be a competitor and enemy of Lolth. Some say, that she built the Temple of Elemental Evil with Iuz. The forces of good launched a campaign against her, trapping her within the temple’s confines. In the current time, Zuggtmoy is presumed released from the temple.