The following can also be found at Bungie.net:
Q: What is Festival of the Lost?
A: Festival of the Lost is a live event that is available to all Destiny: The Taken King players for a limited time. This event includes new Quests, Consumable items, themed Gear and new Eververse Trading Co. items. Festival-themed activities and most non-Legendary quality items will no longer be available once the event is over.
Q: When is Festival of the Lost available?
A: Festival of the Lost will be available during the following times:
Q: Do items expire after the Festival of the Lost event has ended?
A: Yes. Certain items and gear will no longer be available after the event has ended. You can read more about them with the Festival of the Lost Guided Support.
Q: I’ve received Paper Glue and Paper Scraps. What are these for?
A: Paper Glue and Paper Scraps can be used to turn Rare (Blue) Masks into Legendary (Purple) versions of the Masks. Rare Masks will only be available through the Festival. Legendary Masks will be permanently available.
Q: Can I combine the Candy Consumables with my other Consumable items to get more Glimmer?
A: No. Using Candy Consumables will impact the cooldown timer for all other Consumable items for the same race. For example: Using Void Fizz will enable the same “Use” cooldown timer for Black Wax Idols.
Q: Why can’t I purchase the Zombie Dance Emote on my PlayStation 3 or Xbox 360?
A: Unfortunately, this Emote is unavailable on PlayStation 3 and Xbox 360 consoles.
Before we get into the event-specific content, the Cathedral of Dusk is a new Crucible map that also was released today!
YES! The Cathedral is a (mostly) permanent addition to the Crucible. https://t.co/51EyszegkI
— Derek (@_mantis_) October 26, 2015
Even if you can’t play during the Halloween event, this map will be making a return – maybe for Trials?
The Warlocks believe this vile site was a tomb, a place Oryx never thought the Light would touch. But now the Light is here, and Shaxx has claimed the Cathedral of Dusk as a new space to prepare for war.
You have the chance to get the cosmetic Masks, as well as consumables, by purchasing a “Treasures of the Lost” Mystery Bag from the Eververse Trading Company.
Note: You also have a chance at these items by filling up your Candy Satchel. You don’t need to spend Silver for Masks.
Guaranteed
Possible
Rare Masks will expire after November 9th, but if you use Paper Glue (from Mystery Bags or dismantling Legendary Masks), you can upgrade Rare Masks into permanent Legendary Masks.
Wear your Mask and go to into PvE/PvP and kill enemies to acquire Festival Candies. Then, once you have a Full Candy Satchel, you can trade in the Candy for a free Mask.
Three new emotes! You can see these demonstrated in this video.
The Sweet Memories quest starts off by receiving an empty bag from Eva Levante and involves visiting every vendor in the tower and collecting candy into your bag. Eva will also give you a Legacy of the Lost Mystery Bag, which you can open for a slew of Halloween-themed rewards, including a random mask that you can equip in your helmet slot.
After collecting candy from The Speaker, Crytarch, Eris Morn, Shaxx, Cayde-6, Ikora Rey and Commander Zavala, head back to Eva Levante to get a Gifts of the Lost bag as well as a few new quests that involve wearing specific masks to complete specific tasks.
To fill the rest of your satchel, wear your Mask and defeat enemies in PvE or get kills in the Crucible and return to Eva when your bag is full!