I found my first Chest of Sorrow the other day, at least that's what I think it was called. At first I thought the water spewing from the sides what just a cute gimmick, as though the chest was crying. Then I got it on board and it started to fill up my boat. My partner in crime started bailing as I quickly set sail to an outpost to get this thing turned in so we don't sink while looking for more treasure. To my dismay the chest stopped crying after a few minutes, and took away any urgency to turn in the chest. To this I suggest that the chest never stops crying, and even starts to spew more water the longer it is on a boat.
Other chest suggestions:
Skeleton Chest: Will cause constant skeletons to spawn on your ship until you turn it in, progressively getting tougher and tougher. However the longer you have it on your ship the more gold it will be worth to maybe a cap of 3k or so.
Storm Chest: A chest that forms a small storm over you boat attracting lightning strikes until turned in.
Chum Chest: A chest that attracts multiple sharks when in the water. You can use this as a defense if being engaged up by dropping in the in water detouring would be attackers from swimming up to your ship and boarding. Also when you get sunk and all your treasures float for the enemy to gather, it would make it more difficult to plunder.
