I was thinking in advanced areas there could be a small chance that when you open a chest a monster pops out and attacks you. If you win you get a chance at special monster chest loot, the monsters cou.ld also be reskinned to look more exotic. This would add some excitement and suspense to chests. If it makes chests alittle to dicey, you could always make monster chests different looking so people know of the risk before opening them.
