Grasp of Orcus
A giant fungal colony and the world's largest single life form.
Araumycos is a vast fungus colony with a single mind, which fills the caverns and tunnels of the Underdark in an area the size of a small country. As such, it is both a sentient being and a location.
The Evening Group first heard of Araumycos from Winds of Jaquiche, who had recently learned of Zuggtmoy’s presence in Neverlight Grove. Zuggtmoy had learned of Araumycos’ existence and had hatched a plot to meld with it and take control. Since Araumycos is so interwoven with the fabric of the world, control of it would grant Zuggtmoy nearly unlimited power in her new home.
As of yet, the party has not actually visited Araumycos.