Overview of the Dynamic Events System:
Enter the living world of Guild Wars 2 - filled with thousands of dynamic events that ebb and flow through the course of your adventures. One day there may be a thriving village filled with vendors and townspeople, the next day that village may be a smoking ruin overrun by centaurs.
Dynamic events evolve and cascade across the world in response to how you, the player, interact with them, leaving persistent effects in the game world. Will you save that village or let it burn? The choice rests with you and your fellow players.