Here are our free preview cards from Wizards of the Coast, thanks WotC for that!
Being a core set, it seems super fitting that blue white skies would be a thing, and based on these two uncommons it certainly seems that way!
Falconer Adept is the kind of card that if you can just turn it sideways one or two times, it builds up flying force that makes it worth protecting or even trading it off.
Watcher of the Spheres is another powerful uncommon with some relevant static abilities but don't be fooled; those are all icing on the 2/2 flying cake here, this card is excellent!
Looks like they are sticking with the baseline themes for this core set, at least in the case of blue and white.