http://bosel.blog64.fc2.com/blog-entry-3127.html
Looks like the Extra manga is also trying to incorporate elements left over in the data-book.
"It deals heavy damage that no living thing, no human can take, but the protagonist isn't alive in the first place (spoiler!) so he has a small chance of withstanding it, since the protagonist has yet to be afflicted by the suffering of life or the four noble truths.
If the production budget for EXTRA had been ten times higher, I would have put in a gimmick where the protagonist would achieve enlightenment (gain strong convictions) over the course of the game and overcome this attack.
In the battle against Saver in the game, it's depicted as an absolute game-over attack thatfs deployed if you donft finish the battle within a set number of turns.
The damage is 5,670,000,000 by the way"