-2195876293857% accurate (note the negative)
...
Hint: Joubutsu almost DID succeed.
...actually you probably wouldn't get it yet since I haven't actually told how the world incinerator works yet...
Oh, and Manka/Joubutsu's body doesn't exist in the surface world
...shame how I already gave spoiled this part awaysome quite a number of pages ago (albeit probably unclear) ('this part' referring to how Joubutsu was able to get into the surface world) and you either forgot or didn't get it 
EDIT: Reading it over again, I'm tempted to nitpick on some of the details you seem to have forgotten...
...

Hint: Joubutsu almost DID succeed.
...actually you probably wouldn't get it yet since I haven't actually told how the world incinerator works yet...
Oh, and Manka/Joubutsu's body doesn't exist in the surface world
...shame how I already gave spoiled this part away

EDIT: Reading it over again, I'm tempted to nitpick on some of the details you seem to have forgotten...