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FM Guardian Star

A chart showing the relationship between the Guardian Stars. Moving clockwise around each group, each Star is strong against the next Star and weak against the previous one.

A Guardian Star is a Monster Card property in Yu-Gi-Oh! Forbidden Memories, based on the Alignments featured in other games. Each monster has a choice of two Guardian Stars, which dictate the element it uses in its battles. Each Guardian Star is named after a celestial body; the sun, the moon or one of the eight extraterrestrial planets in the Solar System, following the classification prior to the 2006 revised definition. Each Guardian Star is strong against one other Star and weak against another one. If a monster battles a monster of a weaker Star, it gains 500 ATK and DEF. This is indicated by the color of the "Guardian Star" text. If it is yellow, the opposing monster is weak to the attacking monster's Star, but strong if the text is red.

When a player Summons a monster, they choose one of its two Guardian Stars. The CPU opponent always chooses the first of the two. When a battle is viewed in 3-D, the monsters use different attacks depending on their Guardian Star.

The only celestial body not used as a Guardian Star is Earth. Likely because it is already used as an attribute for many monsters.

The Guardian Stars are as follows:

Guardian Star Symbol Alignment Strong against Weak against
Sun White Magic Moon Mercury
Mercury Black Magic Sun Venus
Venus Illusion Magic Mercury Moon
Moon Demon Magic Venus Sun
Mars Fire Jupiter Neptune
Jupiter Forest Saturn Mars
Saturn Wind Uranus Jupiter
Uranus Uranus symbol Earth Pluto Saturn
Neptune Water Mars Pluto
Pluto Thunder Neptune Uranus
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