Coup de Grâce
Multi Masher is the deathmove of The Metal Mob special monster team, which consists of Metaly, Metabble, and Hev. It is a unique version of Magic Burst that inflicts 110~130 damage to random enemies 3~10 times, using up all of their MP.
Multi Masher appears as Jessica's Coup de Grâce. It can be learned at level 80 and uses all of her remaining MP to cast. It has a range of up to three squares away from her and inflicts unreflectable spell damage to a single enemy. Since it is a Coup de Grâce, it takes 5 turns to charge and can only be cast once per battle. Upgrading the skill increases its damage.