The interactions with the Red Wizards of Thay provide a secondary antagonist group. They are also looking for the Soulmonger but for their own nefarious ends. The Tomb of Annihilation PDF details their leader, Valindra Shadowmantle. She is a lich disguised as an elf. Knowing her true nature is a secret the DM must keep. The digital profile of her character helps the DM play her with the right mix of charm and menace. The PDF explains her potential alliance with the players, which is a dangerous but potentially necessary evil they might have to accept. https://tombofannihilationpdf.store/ D&D Tomb Of Annihilation Adventure Book Filetype Pdf