The Engineer's Sword is a quest item in Divinity II: Flames of Vengeance. Defeating the Engineer in Source Square causes a chest to spawn in the center of the platform, containing the sword. It is needed for Clue IV of To Find a Wizard.

Examining the sword reveals: This magnificent blade of time-forgotten centuries reveals in runic shapes: "The Fire God resides in the snake's mind" - a clue concerning the orbs found in Champion Academy.

Engineer's Sword examined (D2 FoV quest item)

Examining Engineer's Sword