As the saying went, "Gentlemen can wait for a long time until they can take revenge, even for ten years."
Frost was not necessarily a gentleman, but he was a type of "even for ten years."
In order to take revenge of that time, Gerald had quietly endured for a long time while secretly planning and building a good relationship with several legendary strongmen under the Church of the Void Mask. For that, he had even lowered himself to help the knights train as a vivid textbook.
In the end, he had finally gotten the opportunity while waiting.
At the end of last year, Gerald had finally mastered his own strength. He had been able to control this power freely. Not only had he been able to change his size at will, but he had also gained many extraordinary abilities as well.
In addition to the human figure, he had essentially been a powerful legendary creature, even stronger than many dragons.