Publisher's blurb: The Lich-Queen of the Githyanki is one of the most evil beings in existence. Now she has a new scheme, one that will see her become more powerful than ever before. Our heroes must journey to the Astral Plane where they will encounter astonishing new locations and terrible new enemies. Can they thwart the diabolical plans of the Lich-Queen and save the multiverse? This 4-6 hour adventure is for characters of 11th to 16th level, and contains new creatures and story elements from Mordenkainen's Tome of Foes.