Objectively speaking, it wasn't a bad plan. All things considered, the fact that Minerva went so far as to do this was actually a net negative for Leonel. This meant that she was no longer choosing to be as arrogant as she was in the past and taking him more seriously.
Honestly speaking, this was bad news for Leonel. Minerva was someone he had only managed to defeat because of her lack of wariness and her overall arrogance. She failed to take Leonel seriously, so she had only brought three people and in the end, she had lowered her guard so far that he was able to snatch victory from the jaws of defeat.
Now that she was actually taking precautions, this meant that the villain he was ready to face off against had changed her deck of cards…
It was just unfortunate she didn't have nearly enough information to play such tricks on him.
