User blog comment:Crimson and Darkness/Shin DxD 3 discussion/@comment-79.119.70.247-20191014170553/@comment-79.119.70.247-20191014184543

Ddraig was not sure, he told Issei better not to risk, and Issei was restrained throughout the fight, because he did not want to affect the pseudo-space, if it was a fight 100% Issei would have the advantage, it was seen during the fight Grassil didn't do too much. Didn't Grassil have any difficulties? who got the most out of the fight? Grassil. Issei disintegrates in PDxD in a second :))). And that possibility was created by the author :)), the narrative sometimes does not match the actions of the past.  Penetration is an ability against defensive abilities, and "resistance" is no exception, we have no proof that Penetration can be canceled, there is only one possibility that cannot be demonstrated.  One more thing, Grassil said that if Issei wants to defeat him, he must have an attack that goes beyond the Maou class.