Since time immemorial, beasts had inhabited Heaven's Spire along with many other planets. They were considered weaker in some planets, and dominated in others. However, one thing was for certain.
They were usually beings with low intelligence.
There was a certain terminology that only circulated within the tower, which referred to the power of beasts. Many planets did not have such classifications, and simply referred to stronger beasts as 'Guardian Beasts' or 'Deities'.
However, the Heaven's Spire classified them into ranks, which were usually dependent on the number of marks a beast possessed. A person gazing upon a beast could automatically sense the number of marks they had.
There was a variety of ranks a beast could be classified in.
[A/N: Refer to the auxiliary chapter.]
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