Halves MP usage in battle.
Half MP, also known as Half of MP, Half MP Cost (消費MP半減, Shōhi MP Hangen?), Mental Discipline, or MP Efficiency, is a recurring support ability that reduces MP cost by half. In some games, MP costs can be reduced to one using a similar ability. It is generally associated with the Gold Hairpin and Luminous Robe.
The Gold Hairpin relic cuts MP cost in half. It can be found in Narshe (by saving Lone Wolf the Pickpocket instead of Mog), Mt. Zozo, and the Ancient Castle. They can also be obtained through the Dragon's Neck Coliseum by betting the Crystal Orb, Dragon Horn, or Ribbon.
Half MP is a support ability learned by Vivi, Dagger, Quina, and Eiko. It is learned from the Add-on Protect Ring and from the Light Robe. Mastering this ability requires 140 AP for Vivi, 125 AP for Dagger, 90 AP for Quina, and 120 AP for Eiko. Eleven Magic Stones are required to equip it.
Penury is only available while under the effect of Light Arts. It reduces the MP cost of the next white magic spell cast by 50%. It is learned by a Scholar at level 10. Its recast Time is a Stratagem Charge.It lasts for 1 white magic spell or 60 seconds, whichever occurs first. The 50% reduction in MP cost does not stack with the 10% reduction from Light Arts, meaning that the spell costs 50% of the normal MP cost rather than the Scholar's reduced MP cost from casting in the proper art. Conserve MP can still activate while Penury is in effect.
Parsimony is only available while under the effect of Dark Arts. It reduces the MP cost of the next black magic spell cast by 50%. It can be learned by a Scholar at level 10. Its recast time is a Stratagem Charge. It lasts for 1 black magic spell or 60 seconds, whichever occurs first. The 50% reduction in MP cost does not stack with the 10% reduction from Dark Arts, meaning that the spell costs 50% of the normal MP cost rather than the Scholar's reduced MP cost from casting in the proper art. Conserve MP can still activate while Parsimony is in effect.
The Sage Ring cuts MP cost in half. One can be found in Great Crystal (only with Diamond Armlet) and it is also a reward in the Rare Game Hunt Club if the player gives the most trophies to Stok. In addition, the Channeling augments permanently reduces MP cost by 10% of the default value.
Reduces MP cost of next attack spell by half, and restores MP when spell is cast.
Reduce MP consumption by half when using magicks.
Cuts the amount of MP used for abilities by half.
Halve MP is learned by the Summoner, Illusionist, and Bishop classes through the Luminous Robe for 400 AP. It cuts the MP cost of the user's skills by half.
Mental Discipline is the final ability of the White Mage class, requiring 450 AP to learn. It requires 2 slots in order to use. Mental Discipline only stays in effect during battle, and reduces the cost of all skills that use MP by half, including Magic, Class Skills and even Fusion Abilities.
Parsimony means extreme or excessive economy or frugality, or stinginess. It implies conservation for the sake of prosperity.
Penury means extreme poverty, destitution, scarcity, or insufficiency. It implies conservation out of necessity.