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Power Master 1: A Strange Journey
In Power Master 1: A Strange Journey, Thunder Swords are rare weapons that can only be bought at the Blacksmith in Dora. When equipped, it increases the wielder's Attack by 100 and has a 65% chance of inflicting the Paralyzed status on an enemy. Equipping it will cause the wielder to become stronger to Ice- and Lightning-based attacks, but become weaker to Stone-based attacks.
Power Master: A Strange Journey MV
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Additionally, once the game is released, this section may need reorganizing.
Thunder Swords return in Power Master: A Strange Journey MV, under the name Plasma Sword. When equipped, it multiplies the wielder's Offense and Power by 1.35, gives them a 35% chance to Paralyze an opponent when attacking, grants them the Lightning skill, and gives them a 14% chance to Counter.
As of demo 0.3.0, Plasma Swords are unobtainable.