Reversion was Davies's third blessing and was of the highest rank that was unknown to humanity… or at least to most of humanity. So far, he had never heard of another person having an Ex-ranked blessing.
This wasn't to say that he was absolutely sure that there weren't any other Ex-ranked blessing holders. In reality, he didn't know if there were any other Ex-ranked blessing holders like him among the humans, and if there were, they were hiding very deeply because there was no way to hide something as high profile as an Ex-ranked blessing.
Such a blessing was too high profile to hide, he knew, after all, he had one.
The Reversion blessing was Davies's absolute fallback should he ever fall into the worst situation possible as long as it had to do with combat. One could say it was his trump card, and he treated it as such, especially as it was an ability that he wanted to use unless he was in the worst situation possible.