Caster's Kingdom Island

A partly manufactured island in the Caribbean Sea and the staging grounds for the Caster's Kingdom Tournament where the best in the world and a few amateurs have been invited to compete for fame fortune and the chance to compete in a match with Nathaniel Jackson the creator or Disc Casters himself.  
"A tournament on a private island for a card game I am guessing that surriving the island is apart of the tournament not just playing a game."

Geography

There is a cliff that overlooks the sea and has Jackson's Castle on it while rest of the island has dense tropical forests, beaches, a meadow, and wasteland.