Trials of the Tanglewood

From the front of the book: After discovering the atrocities of the Empire of the Crimson Light, the Band of the Broken Tower has decided to assist a rebellion against the self-proclaimed “Eternal Emperor” who has conquered the coastal kingdom of Aeris. There’s only one problem: how to find them and prove you are not spies? Rebel infiltrators were sent to the dungeons beneath Aerithmas to rescue an important prisoner, but were misled and failed. However, their ghosts told of a contingency party sent from Copper Hill to find the Oracle of the Tanglewood. Perhaps they can be found and need assistance? An adventure for 9th level adventurers.