My Skills Have No Upper Limit

Six or seven decades ago, countless terrifying demons descended. They possessed bizarre abilities, and governments and armies around the world suffered defeat after defeat, until people began awakening as ability users with special skills.

Zhou Muming is a trainee at a training hall. He ranks first in every subject, but his ability level has not improved at all. An unexpected trial reveals that he is a privileged ability user who can only raise his ability level through specific means.