@rpapo ah, I see... I didn't know the work behind the scenes and thought that based on your comments in chapters 29 and 30.
Anyway, thank you for your work, looking forward the epilogue
@rpapo thanks for changing your mind back there and decided to go a chapter a week instead of one every other week... It would've been a bit rough having to wait until April to see the ending :V
@bastek66 I'm still at the fifth chapter (of this spinoff) so I don't know if the latest does, but in the manga it will (or at the very least, should) be explained. Otherwise you could try to look for the web novel.
They had previous experiences with them, probably it is based on data gathered in the past with ones using the same (or similar) powers with worst case scenario for each of them (otherwise it wouldn't explain such a high number for the first)