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The effects of the Moon Phase during Waning Moon. Kain's Attack power is increased (green), while Jump power is decreased (red).

The light from the moon casts its effects upon all creatures of our blue planet. No monsters can escape from its influence, and neither can you, Prince Ceodore.

Moon Phase (月齢, Getsurei?) is a gameplay mechanic from Final Fantasy IV: The After Years. It involves the cycles of the moon, which have a direct effect on the power of certain battle commands during combat. Depending on the moon phase present at any given time, it has the potential to raise or lower the power of White Magic, Black Magic, special abilities, and physical attacks.


The Moon Phase system is first explained by Biggs and Wedge at the beginning of Ceodore's tale as a mysterious side effect of the phases of the moon. During each phase, one particular type of battle command will have its effectiveness lowered, indicated by red lettering, while another is raised, indicated by green lettering. This condition not only applies to playable characters, but to enemies as well, and can be used to directly affect the difficulty of some battles with proper planning.

There are four different phases that follow a cycle—New, Waning, Waxing, and Full. Phases are cycled every time the player uses a tent or cottage, stays at an inn, or happen automatically after thirty minutes of playtime. In addition to affecting battle parameters, certain enemies will only appear during a specific Moon Phase in certain areas. The effects of Moon Phases still occur even when the player is on the Red Moon or True Moon.

The Moon Phase also affects the power of Band abilities—if a Band ability uses commands to calculate damage that are weaker under the current phase, the Band will be weaker as well. The Divine Heal Band specifically has a different effect depending on the Moon Phase.

Types of phases[]

New Moon[]

TAY New Moon.png

The New Moon phase raises the power of Skill abilities, and will lower White Magic.

During this phase the following monsters will appear:

Waxing Moon[]

TAY Waxing Moon.png

The Waxing Moon phase will improve White Magic and lower Black Magic.

During this phase the following monsters will appear:

Full Moon[]

TAY Full Moon.png

The Full Moon phase raises Black Magic, but Attack abilities will be weaker. Also the Sand Pearl and the entrance to the Adamant Grotto can only be obtained in this phase.

During this phase the following monsters will appear:

Waning Moon[]

TAY Waning Moon.png

The Waning Moon phase will improve Attack abilities, but makes Skill abilities weaker.

During this phase the following monsters will appear:


  • The following are classified as Skill attacks and will be affected by the Moon Phase—Jump, Risk Strike, Aim, Big Throw, Tenketsu, Chakra, Ninjutsu, Bardsong, Piercing Sight, Gil Toss, Jive, Dance, Illusions, Human Kite
  • The following are not affected by any Moon Phase—Awaken, Analyze, Blessing, Summon, Focus, Cover Counter, Bluff, Throw, Mug, Pray, Salve, Escape, Pressure, Taunt, Cover, Shuriken, Steal.
  • Kick is classified as an Attack command instead of a Skill ability, and as such will be weaker during a Full Moon and stronger during a Waning Moon.


The term lunar effect refers to the belief there being a correlation between specific stages of the Earth's lunar cycle and behavior in animals, including humans, that cannot simply be explained by variation in light levels. Claims of a lunar connection have appeared in many contexts, including that those with mental disorders would exhibit periods of increased violent or aggressive episodes during the full moon.

The lunar phase or phase of the moon is the shape of the illuminated (sunlit) portion of the Moon as seen by an observer on Earth. The lunar phases change cyclically as the Moon orbits the Earth, according to the changing positions of the Moon and Sun relative to the Earth.

A natural satellite or moon is an astronomical body that orbits a planet or minor planet.