User blog comment:Crimson and Darkness/Shin DxD 3 discussion/@comment-79.119.70.247-20191014170553/@comment-28884330-20191020163426

@Anon Gressil gained resistance to light, which is the quintessential weakness of Devils. Him becoming resistant to Penetrate would not be weird whatsoever, and what does it being a dragon ability have to do with anything? Dragon abilities are not inherently stronger than Devil abilities or those of anyone else. Also, you keep mentioning that Issei was restrained in the fight, without accounting for the fact Gressil was also restrained and only fought to his fullest when battling Tobio. Also you act as if Penetrate is absolute when no abilities in DxD have been shown to be absolute. If anything, such things are constantly disproven, since in DxD you can somehow become resistant or immune to cheat abilities just through being stronger. The author never forgot Issei's skills, he simply made Gressil strong enough to deal with that. That's how fictional stories work and there's nothing wrong with it.

@Leglanddu59 The author didn't "nerf" Issei. Issei didn't have his wyverns available because they were being used on Xenovia, and if they weren't used on her she would have very likely not be able to hold Strada back and would allow him to wreck havoc. Issei's wyverns also have a limit to when they're destroyed, so even if they were used to stop one or two of Rias' attacks, it would be irrelevant. You guys have the wrong assumption that Issei has to get "weaker" in order for other people to fighthim, while ignoring that those people have also been getting stronger to catch up and devising ways to deal with him.