Even though the Nether Lake region was considered a boundary separating the nightscape Forbidden Land and the nearest land of the Dark Sky Kingdom, it was essentially part of the nightscape Forbidden Land as well.
In the Nether Lake region, reading Fate and divining Destiny was naturally very challenging, and beyond the Nether Lake region, this act was even more difficult.
The so-called fortuitous opportunity the Brilliant Light Empress sent Maarsha to acquire was not something that would be easily found, much less acquired.
It would instead be a long and tedious process that absorbed much of her time.
Possibly tens or even hundreds of years might not be unusual.
After all, with the nightscape Forbidden Land, and by extension the Nether Lake region, obscuring the secrets of Heaven & Earth, making reading Fate and divining Destiny impossible, Maarsha had no choice but to slowly seek out this opportunity.
