Nap of a Star

Every 5 decades, a weird phenomenon happens in an island called Together Island. It has a bizarre features not like other islands, for it contains weird creatures. It's a main tourist attraction in the island. Back to the weird phenomenon, a huge bright copper star shines every 5 decades in this island, yet it was told that it was only a legend. It grants wish of the five chosen people, they can either wish good or bad wish. What if you're one of the chosen five, what will you wish?