World: Aetherion

Aetherion is a vast fantasy world where humanity coexists with magical beasts, ancient dragons, divine creatures, and mythical entities. For thousands of years, the strength of a person has been measured by the beasts they can contract and the bond they share with them.

Every living creature possesses a Mana Core, the source of its magical energy. However, only those with a compatible soul can establish a contract with a beast.

Some beasts are ordinary creatures, while others are ancient beings capable of destroying entire kingdoms.

The rarest beasts are said to have existed since the world's creation, their names preserved in ancient scriptures and royal archives.

The stronger the contracted beast, the greater the status and influence its contractor may hold. However, a beast's rarity does not guarantee that its contractor can control its power.