The Catan Islands

The Catan Islands is my homebrew campaign setting for Dungeons & Dragons 5th Edition RPG. It's not based on any paticular historycal period, seeing how regular D&D is more akin to reneeisance, but then there's also vikings and other oh-so-familiar cultures, but I would like to say it's more realistic, or less realistic, depending how you look at it...
What is considered the world is called "The Island", or rarely called, The Main Island, since even though the existance of other islands is known, they are so far away that the only people traveling to and fro are those who made it their life's goal.
On the (main) Island however, EVERYTHING (from the Players Handbook, Dungeon master's Guide and the Monsters Manual) can be found: cities, villages, heroes, kingdoms, the Underdark, unexplored forrests, wars, monsters, both civil and not, and so on...
The world is vast, yet it feels small. The world is ancient but it feels young. The world is known, but without basis why... Wherever you turn, you will find something old, but new, expected but not in the same way. This... is the place where stories occur...
The sentence:
"Cobbler wants to reshape the world, but he's having difficulty since his powers are unstable, and needs to succeed before someone realizes he exists and destroyes him."