Allows the user to ignore the enemy's Defense when attacking.
Pierce (貫徹 Kantetsu) is the class skill that is attained after the promotion of either a Pegasus Knight or a Wyvern Rider unit into a Wyvern Knight in Fire Emblem: The Sacred Stones. This skill is randomly activated, and essentially allows its user to bypass the defenses of the enemy being attacked. Like most other skills, Pierce activates at random intervals, with its success rate equivalent to that of the user's current Level.
The Pierce skill is associated with a number of game-freezing glitches, which can be activated by performing Pierce on an enemy who is unable to counter-attack. This glitch does not occur in the Japanese version of Sacred Stones.