Here's the second part of my critique.
I don't have much specifically to say because much is the same as it was before, and I do believe many of the problems spring from your self-admitted troubles with characterization (check my replies to your threads in writing tips ~_^), but there are some things I'd like to note.
Realism: This bothered me more than anything. I couldn't believe for a second Xavier and Lily's reactions to being thrown into some alternate world. They just seemed so matter of fact about it and accepting. I found it very hard to swallow that they even jumped to the conclusion, initially, that they were in an alternate world, and the way neither of them even so much thought about their friends and family was more than a little disquieting. True, you could justify their lack of not thinking much at first to being disoriented, but that doesn't fly for long because you do give the two of them moments for quiet contemplation, such as that first night in Avilandra. Dwell on slow moments such as this, interspersed between the action, to develop their characters and really explore their feelings. Make great use of what you yourself would feel about being thrown into such a world, chances are your reaction will be pretty much spot on to Xavier and Lily's.
Action scenes: I remember you requesting help on action scenes before, specifically on them not being intense enough (IIRC...). And I can see why you worry about that, because the action scenes...your prose is quite good through the rest of the story, very snappy and concise, but during the action scenes it somehow changes. It becomes very detached, almost matter-of-fact. As if you're writing for a textbook instead of a novel. A lot of that comes from being no emotional/physical reactions from Xavier. He doesn't seem to register the pain of the attack, he never feels a rush of adrenaline or blind panic. He doesn't seem to feel any fear or anything a normal person being attacked would. It's difficult to get into the action scene if even the viewpoint character isn't into it. I don't know why either, but your action scenes also end up blooming a lot of excess words that just clog up the prose, something I don't notice in the other parts.
Exclamation points: I don't think I need to say anything more on this besides just stop doing it. Exclamation points belong in dialogue, not prose.
Overall, I did this think this section was weaker than the previous, mostly because I kept on wondering just when Xavier and Lily would start acting and reacting like normal people to everything that was happening. From reading the other comments, I've gathered that at least early on, you have a profusion of deus ex machinas. Already, I've been hit with Arcon and the randomly lying around jewel. I'm glad the jewel has plot significance, though I expect there's a reason for that (even if it has to with a cliche prophecy...), and a reason why Xavier and Lily ended up discovering it quite randomly.
Also, keep in mind what Karsten said about the world's level of technology and such being inconsistent. And try to make sure that the people in the world aren't so nice. It bothers me how unealistically understanding they all seem to be. I'd expect at least some of them would start chasing Xavier and Lily around or treating them suspiciously or throwing them in prison or a mental hospital for being so different. You lost a potentially interesting source of drama by letting Xavier and Lily into the city so easily.
Don't get discouraged--I realize how harsh I'm sounding, but honestly, I woudln't be sticking with this story if I didn't like it. ^^ I'm honestly intrigued to keep reading more and more, and it's only time limits that are keeping me from doing more than 3chapters in one go, because I could just sit here all night and whizz right through them. Your prose is very easy to read, and you'll probably have noticed that from how most of the changes are comments (whereas usually in advanced critiques and even normal ones I'm rewriting whole sentences left and right). And I love the banter between Xavier and Lily. I can already tell, this early, that they're meant to be a couple, and I like how you incorporated that in a roundabout way in their snarky back-and-forth. It's a joy to read and feels very realistic for two kids.
Keep on writing, and PM me if you have any questions. ^^
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