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{{InfoboxMove/Special|image = http[[File://images2.wikia.nocookie.net/__cb20110224213137/bakugan/images/c/c9/Piercian_special_abilityPiercian special ability.jpg|250px]]|caption = Categories: Bakusteel Trap, Block}}'''Twin Shields''' was [[Piercian]]'s Special Ability on [[Bakugan Dimensions]]. It is a weak block and if the opponent's [[Bakugan]] is [[Darkus]], [[Ventus]], [[Haos]] or [[Subterra]], it blocks extra damage. This defense lasts 2 two turns. Its Cooldown period is 3 three turns.