Would it be possible to add a unique chest within dungeons that can only be opened once a day in which all player's reap the awards from said chest, almost like a Daily Treasure hunt.

Players could go through all the dungeons and seek out the chest that would be hidden in either a random location or a certain enemy needing to be defeated for the chest to appear and upon defeating the monster said chest would appear.

It would only be possible to do this once a day in each dungeon and by adding a small mechanic like this it would encourage players to explore more of the dungeon and add in a chest that has the potential to drop rarer loot in which they can only get said chest once a day.