Hey all i decided to open up 50 Treasure Island Chest's and share what i got from them
To find where the Treasure Island Chest is located all you need to do it open the teleport inteface click on minigames and scroll to the bottom and select Treasure Island
Once there you will need to kill the 4 bosses for a chance to get there key
Fear
Cobra
Death
Blitz
Once you have killed all 4 bossed and obtained a key from each you can got the middle of the area and open the chest
Here is what I got from opening 50 Treasure Island chest's on a non-donor account
I belive there is no benefit of being a donor when opening this chest
Hope this helps with finding out what you can get from the Treasure Island Chest in the future.
Turkey