Invincible demon system

There are sky monsters in the world, all of which are mysterious and unpredictable. Hong Yu has a system, can catch them, and can raise and strengthen them. Used!
In addition, there are also strange sky monsters such as experience sky monsters, rare treasure sky monsters, and hegemony sky monsters.
However, this is just the tip of the iceberg, the terrifying super demon makes Hong Yu invincible even in the world!
Based on this, the demoted prince Hong Yu rose up in southern Xinjiang and dominated the universe!
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