The Enchanted Forest

Long, long ago back in the ancient times, there was a sacred forest. It was guarded by a special magic that kept it alive and peaceful with no dangers and plenty of food for the creatures it held inside. The magic protecting the forest was very powerful and there were only two people who could break this magic. There was Alvina. She was the one who put the magic in place and plans on keeping it there until the end of time. The other one was her sister, Calypso. Calypso is evil spirited and wants to get rid of Alvina. What happens when two explorers accidentally discover this island? Will they help it? Or destroy it?