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Power Master 1: A Strange Journey
In Power Master 1: A Strange Journey, Thunder Shields are rare shields, and can only be bought at the Blacksmith in Yora. According to its description, it is created by fusing a Book of Lightning with a shield. When equipped, it increases the wielder's Defense by 50 and the wielder will be immune to the Paralyzed status. Additionally, the wielder will become strong to Stone-, Ice-, and Lightning-based attacks.