CoD BO7 has added a brand new aspect to its campaign in the form of the Avalon endgame mode, which has its own progression, activities, as well as a final boss. But, getting to that final boss is easier said than done, as it is located within the challenging Tier IV area of Avalon, and requires a lot of grinding to defeat it. Here is what you need to do and how you can take on Dr Falkner....