In the Ember Isle zone event In Golden's Grasp there are 4 assaults. Ochrin flys over the sourcewells, says some dialogue, and then a troll boss spawns but on the 4th assault there isn't a troll boss or dialogue. It seemed strange that they would leave these things out intentionally so I always thought this was a bug.
Usually half the players go to the 4th Assault and the other half go to the beach and wait. I have tried both and received the same amount of inscribed.
I searched the forums for this but didn't find anything.
If it isn't a bug Trion consider adding a 4th troll boss so that everyone will have a reason to go to the 4th Assault.