The Siege of Neverwinter event is incoming and is expected to kick off on November 29th and last through December 13th. During the event, players can take part in a number of activities including stemming the Cult Invasion, taking the fight to the cult in Counter Attack or head into battle against dragons themselves. Participation will net players specially themed Dragon Hoard Coins, Dragon Hoard Coffers and other items from the Tyranny of Dragons campaign.
Currencies can be exchanged for several items including the Siegebreaker Griffon mount, the Neverwinter Champion's Charger, the Champion's banner and more.
Check out the full list of events and rewards on the Neverwinter site.