Prism Island has always been a place of mystery and mentioned in many ancient books.
The ancient books all say that Prism Island is where the Evil God is imprisoned. It was rumored that the powerful spell waves casted on the Prism Island when they sealed the Evil God in was what kept the Evil God trapped.
Even after he was buried deep underground, the Evil God still fought for three days and nights before he was exhausted and gave up.
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In three days and three nights, the scales of the evil god peeled away under the influence of tremendous magical energy.
Such strong hatred was sealed inside the scales that each individual scale became its own sentient being; each one turned into a Turtle-Armored Beast.
Such beasts have hard, rough shells and aggressive, wild natures. They say such hostility was inherited from the evil god.