Here’s something that I’d do…
Have a one room dungeon for Darkmoon Faire to start off. Have a circular room with a centre piece that raises and lowers during the event. Now when the middle is lowered the boss is attacking players with various abilities. Then the boss disappears and the middle section raises to show a statue of him/her.
While this is happening the room is rotating at a slow-ish pace. Around the walls are extendable panels which will randomly spring forward hitting players in the way causing damage. There will also be panels on the floor that will start flashing before they spring upwards launching the player into the wall making them take damage.
The mount that would drop would be a low chance like the Love Rocket. It would be a creepy clown car looking thing that would be a ground only mount.
