How about archaeology in there somewhere? Could be a nice segue into mythology too... There's already all those nifty archaeologists chilling at the BC caldera. I had expressed this concept to Brick a while back in game (in other context, not nexus/rev), in the form of a recurring quest with daily rewards coming from random items dug up in and around graal, then exchanged with the BC fellas... maybe some kinda collection that you have to trade for (I am envisioning the easter egg hunt mob asking for things like the pharaoh's headpiece and canopic jars)...

Could be nifty