“Tyranny of Dragons” is a Dungeons & Dragons campaign storyline that was released in 2014. It consists of two adventure modules: “Hoard of the Dragon Queen” and “The Rise of Tiamat.”The storyline follows a group of adventurers who must stop a group of evil dragons known as the Cult of the Dragon from obtaining a hoard of magical artifacts and using them to resurrect the dragon goddess Tiamat. The cult has been collecting these artifacts and using them to power a spell that will bring Tiamat back to the mortal realm.The adventurers must journey to various locations, including the town of Greenest and the city of Elturel, where they will encounter a variety of allies and enemies, including a group of mercenaries hired by the cult, a group of rebels fighting against the cult, and a group of dwarves who have their own grudge against the dragons.Ultimately, the players must find a way to stop the cult and prevent Tiamat from being resurrected, either by disrupting the spell or by defeating the dragons and their allies. The storyline includes a variety of challenges for the players to overcome, including battles against dragons and other monsters, puzzles to solve, and moral dilemmas to confront.