User blog comment:Crimson and Darkness/Shin DxD 3 discussion/@comment-79.119.70.247-20191014170553/@comment-79.119.70.247-20191014175545

It can become resistant, but only to a certain extent. Why do you think he could get penetration resistance? Penetration is an extremely dangerous ability that has been sealed, and the ability of an HD, from the proud species of dragons, do you think that "resistance", a demon's power can oppose problems against a dragon's ability? Penetration in the end is the ability to pass through defensive skills. The Boost did not directly affect Grassil, transfer to it, reflection (with this ability he can reverse the attack), and with divide can half the power of Grassil's attacks. And the Maou-class demons can easily defeat low-caliber gods. Euclid also outperformed the Mahogany class in Booster Gear replica, but Issei being on the basis of a demon of the ultimate class won the fight, because he used to divide and reflect, so what he means is that even if you are stronger in the base, because some abilities that are on opposite poles are used together make you op.