So let me put this straight.
Philosopher stone crafting requirements some times listed by many legendary items or horrid story.
Example 1 (game term) :
- Dragon Blood - Mystery Elixir - Saint Quartz
Example 2 (modern/pop-culture term) :
- sacrificial of holy maiden/pure-breed demon
- sacrificing 100 or more human at full moon in specific date and month.
If we just see the outline without considering any detailed recipe and magic formula, we can assume Philosopher's Stone are created from 'massively condensed mana'.
Not only can continuously recharge it's own power by absorbing mana from nature, the stone also multiply it's mana gain. Depending on wich grade item that used and complexity of the formula. That if I'm not wrong, the lowest multiplied are 90x up to 200x. Which also works the same when enhancing spell.
Summary, the author are not exactly wrong but by magic and alchemy law it's not exactly right either.
Then again, this is just my own thought. And once again, one of many generic isekai'd that failed in exploring basic world building then blaming 'He got OP power, so why not?' reason.
Right?
