I don't think the bolded/italicized text works. Not only are you switching between different ways to emphasize text (generally a bad idea), when I'm reading the text the text I'm mentally emphasizing isn't the same as the text you are, so it comes out as awkward. I would suggest selecting only one method to emphasize text and being more judicious in how you use it. I would also suggest only emphasizing specific words rather than entire sentences, as that feels more natural.
Part of the conceit of this piece is that warnings are disbelieved due to modernity's influence. But the sphere's properties are apparently well-known enough for random outsiders to visit and study it for years. You can have the sphere be obscure enough no one cares about it, in which case it shouldn't have such obvious supernatural properties or needs to not be such public knowledge. Or you can have people know about it, know it's supernatural, and draw the wrong conclusions.
You switch tense a lot in this work and go from providing a long background to what's going on to more conventional third-person narration to a first-person narrator. Choose one of these approaches. Packing them together clashes.
Lastly, you have a ton of sentence fragments. For example:
While Amara stayed frozen by the realization of her actions. The child turned and walked across the water, gliding effortlessly toward the mainland.
This needs to be one sentence; that period should be a comma.
You also are missing line breaks between paragraphs and switch between leaving baylans lowercase and capitalizing it.
