Luna (月光 Gekkou, lit. Moonlight), also known as Moonlight Sword (月光剣, Gekkouken, Lunaire in the French version, Selene in the Spanish version) and Pierce, is a skill that is first introduced in Fire Emblem: Genealogy of the Holy War. When activated, this skill allows its user to negate or halve the enemy's Defense, allowing him/her to inflict higher amounts of damage in the process. In TearRing Saga: Utna Heroes Saga, this skill is known as Geomancy (風水の技 Fūsui no waza), where it not just negates Defense, but also negates Magic.