User blog comment:B214/Volume 23 discussion blog/@comment-82.178.103.238-20170802211752/@comment-10330822-20170806021445

Actually, I remember reading it, I just have a sticky mind like that. I just don't have an archive of the volumes. Besides, if you doubt it, maybe bring it to @B214's attention. He's the one who seems to be able to quote the series like the Bible and has access to the reference material. He'll tell you whether it exaggeration or not.

Still, it makes sense, the past possessors gave Issei the form after he freed them from their anger, which is what powers Juggernaut Drive. In other words, it was the alternative born out of that. I thought it was common knowledge that it was the equivalent, yet not as powerful because of Issei's lack of mastery

At the very least, I don't think its too much of a stretch to use the site as reference material, if you can't trust it, what is its point then? I'd like to assume the editors are doing their job and keeping the info up-to-date and correct.