As of today, a new PvE expansion — The Fall of the Dark Brotherhood — is available for Elder Scrolls: Legends on PC and iPad worldwide.
For $20 or a non-descript amount of in-game gold, you will get access to 25 new missions and 40 new cards. Many of which are only attainable via playing the new story missions, including 3 new legendary cards.
The campaign itself focuses on, well The Fall of the Dark Brotherhood. Taking place prior to the events of Skyrim, you are hired by a merchant to find his missing wife. This eventually leads you down a twisting path into life as a double agent in the Dark Brotherhood itself.
In one mission you must protect a pig. Not this pig.
Throughout the campaign, there are tough decisions you must make which affect the missions that you play. This suggests that there is potentially replayability to the campaign itself. However, it has been assured that you will be able to attain all of the cards regardless of your decisions.
The missions themselves will feature many unique scenarios which you must continually evolve and adapt to. For instance, there is a battle that takes place during a ball where things continually move around. There are even certain situations where you can go undercover, abandoning your deck in favor of a special deck more like that of the person you are disguised as.
Elder Scrolls: Legends is available for download on PC via the Bethesda.net Launcher, or on iPad via the App Store.