The Fall of Drake's Breath - Final Fantasy XVI Database

In-game Description

The Mothercrystal Drake’s Breath, held by the Iron Kingdom since before the fall of the Duchy of Rosaria, was destroyed in the year 878. When its heart was shattered, the ensuing destruction took with it not just Mount Drustanus, but the entire isle of Beinn Leodladh. Imreann, Patriarch of the faith known as the Crystalline Orthodoxy, was also killed in the attack.