Respect The Erde Kaiser's

all the quotes are from official database found in Xenosaga Episode III

these first two are the Professor's creations and are both weaker than Dark Erde and Sigma

Erde Kaiser
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"the True Ultimate Lightning Sword boasts destructive power so great it could shatter the moon."

Erde Kaiser Fury
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"the True Ultimate Ice Sword has the power to destroy even the stars themselves."

these are the Dark Professor's creations

Dark Erde Kaiser
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"the True Ultimate Fire Sword with the power to obliterate even black holes."

Erde Kaiser Sigma
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"With all of its parameters thee times Fury's and its attack power a startling five times as high....

Supreme Emperor, which has the power to rend spacetime itself."