While talking to Scholar Farlin about the history of the world:
The circled period should be a colon, since we're talking about a series of items (people) following it.
The larger circled section should read "... devised by the General of the Army-- the King's very own son, Prince Ryan --in order to ..." because naming the son this way is an interruption of the sentence with a relevant detail.
And ...
"... from the dragon's lair." is actually referring to multiple dragons in one lair (as noted in the very next sentence, so this should be "... dragons' lair."
In the next section of his ... history lesson ... Scholar Farlin ends a sentence and names the series of elements belonging to the spheres. As mentioned previously, that'd be a colon instead of a period.