Big Tree

A giant tree on an island of the Material Plane surrounded by Feywild. The inside of the tree has been hulled out and built into a bustling outpost of the Emerald Enclave, run by giant sentient rat scientists. President Fibbs and the Ratty Senate preside over "The Grand Experiment," a sacred mission entrusted to them by Fælar and Gazer of the Enclave.

It is revealed at the end of Episode II, Big Tree State of Mind that Gazer and Fælar planted the giant tree around a magical piece of sheet music they discovered in the clearing, hoping to protect it from nefarious uses.

With Gazer dead, Fælar sends the music home with The Waterdeep Branch of Acquisitions Incorporated for safekeeping, and to avoid further danger to the rat scientists if others should ever discover the truth.