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After being cast out as an exile for using alchemy, Scar's brother returned during the war and offered to create a Philosopher's Stone that could be used to drive out the invaders. He turned himself into a living transmutation circle and absorbed the souls of all the Ishbalans who died in the war to create the Stone. During the Ishbalans' flight, Scar was fatally wounded by Kimblee but was saved by his brother, who gave him his own right arm and all the souls he had absorbed. In the anime, Scar continued his brother's work on the Stone and after several years of research, created one in Lior by sacrifing his own life and the lives of 7,000 Amestrisian soldiers.

In the manga Ishbal makes no Philosopher Stone, Amestris uses them to make the first Philosopher's Stone which they gave to Kimblee. Scar's Brother never tries to make one.