The Elder Scrolls Online is pulling out all the stops in celebration of its third anniversary. From April 4th through April 18th, you can log in, complete the Ache for Cake quest to get a piece of the Jubilee Cake. When placed in the world, it offers an hour long 100% XP bonus and will later be turned into a Memento for your collection. I
n addition, completing daily and weekly quests will, alongside normal rewards, give you an anniversary box. Anniversary boxes will contain crafting materials as well as the guarantee of at least one rare item (Nirncrux, Motif chapters, Style items, Furniture crafting items, etc.).
You can read the full announcement on the Elder Scrolls Online site.