>>knowing that they will be sold on to merchants, who will then in turn sell the items onto people all around the web.<<

The second use should say "on to" not "onto" above.

>>Many of them own property here as well as on Kniroch, if they can travel to Oracle.<<

Does being able to travel between worlds typically make people wealthy, or is the land on Oracle just that cheap?

Also, after the previous worlds were earth, water, and air I expected a fire world and was surprised not to find one. Interesting. It's kind of like the Celtic three realms of Land, Sea, and Sky instead.