ToME: the Tales of Maj'Eyal

The Fonts of knowledge present in The Place Which Does Not Exist can be used, and then when hit by the meteors from crown of burning pain, will enter an unused state, they may be used again, or not, and after the meteors terrain adjusting effect expires the fonts will once again, return to an unused state, this can be exploited as often as was necessary for "testing" *coughs*

Ahahah, testing .. sure ...

Same for saving there and then reloading game.
You can do this infinite.
Just for testing purposes obviously.