To annoy Jake as well, Diego fired the combination of his electric sword and Mana Blade several times. However, the dark flames swords turned into walls and protected Jake. Diego wasn't a mage, so it was only natural that his magic attacks wouldn't be as powerful as his physical ones. Still, Jake wasn't one, either. His flames were powered by his anger, and that pissed Diego off… he refused to accept that his anger was more powerful than his wish for revenge.
For Diego, someone like him had no right to be angry, he had only accepted his death, and that was all. In a sense, his anger was even more unreasonable than Jake's, but he couldn't see that… Regardless, Diego raised his sword and then made a lot more energy from the machines being drawn to the weapon. He was going to overpower him anyway, so he might do it as soon as possible…
