Grambians: The Caged Land

Gramby, the son of the God in the fictional universe, always fell in love with magic and wanted to be a wizard. One day he was given a massive island as his father wanted to satisfy him but he left Heaven and due to his act, he lost his immortality.
Grambia, his land, was filling of astonishing and swell things and was full of wizards, who could go out oft he land on his very days. But ordinary people could never see the island.
His three assistants were given special powers and abilities.
Days by days came nearer his death, and he doubted that his wizards would go outside and attack the other folk. And he kind of knew that his assistants would betray him after his death.
All he had were curses.
The land got caged by magic unseen walls because of his curse. If you get to Grambia, you have to be a wizard. You can't pass through the walls, and if you do, you'll die.
There was a diamond in his castle, if one can destroy the diamond, the land will be saved.
There is a prophecy. A person from the outer world would get to Grambia and save it!
But nothing was sure that that person would get to good people.
Surely after his death, his assistants built three cities fighting each other. They could not destory the diamonds, but tend to fought each other to rulet he land but nobody literally won.
Jim Bilder was an ordinary boy who got to Havill, one of the very few places in Grambia that were left undisturbed.
Learn how the land was saved.

Get your soul sinking in Magic. The scuffles are filthy but they kept on fighting stupidly.

Ferris Stonehenge is unbearable.
Rutherford Pearson is the greatest swordsman for Jim.
Hadwin's potions are unique but fab.

There are monsters, magic creatures and forests.
Swordsmen are also a kind of wizards.

This is my first novel that I publish.
I'm trying!!!! Trying to write better.
Thanks for trying my story!!!