What's inside? Adventure!

~A lost plane of existence, abandoned for centuries by its creator
~Another sun, shining upon a strange, jungle oasis.
~The realm of a bizarre lich, and his twisted zoo, filled with mutated creatures
~A sandbox adventurehttps://t.co/LOmndITxpL

— Frog God Games (@FrogGodGames) April 14, 2020

Weird. I thought employees at WotC could not publish externally. This is something that Mike wrote years ago before 5e was released. The FGG have simple resurrected the old file and finished making it 5e compliant.

— Alex Kammer (@GHC_and_Tacos) April 15, 2020