This is a world where people can summon contracted spirit beasts.
In this world, bloodline rank determines both the starting point and the end point of cultivation.
Everyone else summons powerful spirit beasts.
But Chu Yuan, whose bloodline is merely mortal, summons only a bug that is judged to be nothing at all.
Mocked by everyone, he is just about to give up when:
[Ding... Activating the Zerg Swarm System.]
[Congratulations, Host. You have activated a first-tier Bone-Eating Blood Maggot Queen. It can replicate one worker bug of equal rank every second.]
[Beast Taming Space unlocked. It is limitless in size, and worker bugs will automatically replicate inside it.]
[Refining heavenly treasures and hunting living creatures grants vitality and experience points.]
[Vitality points can increase the Host's cultivation. Experience points can level up the queen or unlock new queens.]
[Ding... Congratulations, Host. You have received a Beginner's Gift Pack.]
[Beginner's Gift Pack: Zerg Compound Eyes. Switch between the perspectives of any worker bug. The number of compound eyes increases as the number of worker bugs grows.]
You summon spirit beasts, but I have a System.
With the System in hand, the world is mine.
Sure enough, I'm still the protagonist of this world.