Dungeons and Dragons Online recently launched its fourth major update, introducing new items and adding a new Adventure Pack with Sentinels. To celebrate the update's launch, Turbine has announced a 10% experience boost for players. The boost is currently in effect and will remain available until April 18th, 2010. The bonus will also stack with Experience Elixirs found in the DDO Store. So stack up on your potions and start grinding those levels.