Moon Saber is a recurring spell in the Mana series.
Moon Saber is one of six spells taught by Luna, the Mana Spirit of Moon. It is a support spell that allows the target's physical attacks to cause 25% more damage and absorb all damage done to enemies as HP. Using a physical attack against an undead enemy while Moon Saber is in effect will result in the undead absorbing HP from the attacker.
The amount of HP recovered is 15% of the damage dealt.