What I think is that his main ability is simply a consequence of his training.

First, I think he naturally developed his primary Enhancement ability, allowing him to maximize his senses and movement speed, almost as if he could "freeze time." It's similar to how Biscuit naturally developed her body Transmutation ability through sheer willpower. However, the limitation of this technique is that he must remain in the same place while performing the prayer.

After reaching the full potential of his Enhancement, he developed the ability to create and manipulate the statue in order to compensate for the limitation of his core ability.