When Li Nian woke up, he was already in the Colosseum of the Star Alliance.
In an extremely boring universe, a pastime called "Insect Fighting" was invented: each year they capture a human, throw them into the arena, and kill each other live. And he was the "worm" that was thrown into the jar.
The good news is that he is bound to a "companion growth system", and each prop is more outrageous than the last - a Tom experience card that can transform into an unbeatable cartoon cat, a teleportation gun that can tear apart space, and a whole mall filled with anime and movie artifacts.
The bad news is that this system is serious, and the Colosseum is serious, but he is not serious.