After attending Alfons' funeral, the Elrics then ride in a vehicle which contains multiple travelers, driven by the real world versions of Lust and Scar.
He finds the dragon, which turns out to be the Homunculus Envy , in the form he took after crossing through the Gate.
Fullmetal Alchemist the Movie: Conqueror of Shamballa
Later, soldiers from the mysterious pro-Nazi secret society known as the Thule Society open a gate to Amestris believing it is their fabled utopia Shamballa, unbeknownst to them they are crushed due to pressure from entering the gate and are covered in gate-children.
After that, Edward exits the ship, and notices that Noah is cradling Alfons' dead body, knowing that he was shot in his chest.
Description: At first skeptical, Ed joins the search at an abandoned castle where the dragon was last sighted.