Personally, when I found this on the sinster desgin version I tried for days to get it open. When I did I was so amazed. Once, you open the chest you have the option of fighting the queen and dean battles again. I won at those, and kept restarting my game, where I would take the chest filled with 5,000 gold and train my shadowlings, dorgon, gamblin jack, and niven so that thier power was at 25 each and their defence was 23, 28 for fetus. I think it was a nice treat at the end to do that because their were some battles like the queen that gave soo much money comapred to regluar battles.
Heck Ya You Should Open The Chest. It is only on teh CD version and sinster desgin evrsion though.