In Shadow of the Colossus, the central task is to locate and slay sixteen colossi scattered across a forbidden land. Wander travels with his horse, Agro, carrying a stolen ancient sword—the only weapon capable of killing his targets.
His quest begins with a bargain: the disembodied entity Dormin says that reviving a maiden named Mono may be possible if Wander destroys the colossi. Each death will destroy a corresponding idol in the Shrine of Worship. Dormin warns that restoring her life may exact a great price, but Wander accepts the task.