*Beast Controlling World:** A vast world called "Sky Realm" or "All Souls Realm". Humans are not the only masters. Powerful spiritual beasts (or fantasy beasts, star beasts, and war beasts) are all over the world, possessing diverse powers such as elements, spirit, body, space, and time.
* **Beast Controlling System:** Humans form contracts with spiritual beasts by awakening the "Beast Controlling Space" or the "Soul Contract Mark". The level of the contract (such as temporary contract, soul contract, symbiosis contract, natal contract) determines the depth of the bond and the degree of power sharing.
* **Strength Level:**
* **Beast Controller:** Apprentice, Junior, Intermediate, Advanced, Elite, Master, Grandmaster, Legend, Sanctuary, Divine Realm. Each major level is divided into 1-9 stars.
* **Spiritual beast:** Infancy stage, growth stage, mature stage, complete body, lord level, king level, emperor level, supreme level, immortal level. Corresponds to the human level, but spiritual beasts of the same level are usually stronger. There are special evolutionary routes and bloodline regressions.
* **Core resources:** Spiritual crystals (energy currency), attribute crystal cores, evolution materials, heavenly materials and earthly treasures, ancient ruins, contract scrolls, and beast-control secrets.
* **Forces:** Beastmasters Association (official/neutral), major beastmaster academies/sects, empires/kingdoms, ancient families, secret organizations (both good and evil), spiritual beast groups (some are hostile to humans, some coexist).
