Tough v04 c35 - 064
Iron Muscle is a variation of the old Chinese martial Arts technique “ Iron Spirit”. In reference to its very name, the Iron Spirit is an exercise in which the practitioner conditions their body to become durable enough to resist an enemy's attack without succumbing to serious injury, if any at all. However, Iron Muscle has transcended the properties of the ancient technique, to the point where user becomes like a piece of metal itself. Resilient and impenetrable, Iron Muscle is so great that it is almost impossible for any blade to cut through it nor to pierce it.

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