Not sure what to call the tower: Temple of the Gods; Boss Tower; End Game Tower; etc.
I propose a 40 plus floor grand master tower that takes 10 consective wins to finish it, while allowing friends to port in to the current floor. Every time you beat a floor you advance upwards 1 to 4 (or more) floors based upon such factors as how many turns it took you to win. The easier it is for you to beat a floor the higher up you are moved in the tower and the higher up you are the harder the tower is designed to become and the better the non-trade equipment drops become. If you can breeze through every floor in short time, then you can make it all the way to the top floor. If however you can't the highest floor you can reach will be lower. Once defeated, you have to start all over from floor one. Every time you enter the tower you can expect to face different floors and subsequently different bosses each time in. The different floors will have different schools and types of bosses making things a challenge for different schools, often prompting players to have to adjust their decks per floor before entering into its fight. No matter how high in the tower you go, once you win 10 floors the tower completes. This tower is game expandable, that is when new worlds and new areas come out, the tower can be made taller (instead of being able to advance say 4 floors at a time, 5 floors at a time could be made possible changing the tower from being 40 floors to being 50 floors).
A lot of existant boss fights could be added as is to the tower. That is to say that Ravens could be one of the floors, a brisk breeze boss could be another floor, a warehouse boss could be another, the non-washed down malistair fight could be yet another. The idea is to make this for grandmasters, and those who struggle will simply enter into easier floors than those who don't struggle allowing everyone a challenge.
The idea also is that during school people have less available time to play, but could likely have time to do a ten floor tower with their friends, expecially if that tower is challenging and changes based upon how well they play. It also would take a long time to farm for yet better equipment as specific equipment would only have a chance to be obtainable on certain floors.
In short, this tower gives grandmasters a really good end game while making it hard to get all the best equipments and encourages friends to play together while not being redundantly boring. The tower can be added to as the game progresses or if it becomes too easy for some. It is a tower that is intended to be played over and over and over again. The higher you go the harder it gets, but if you struggle you simply aren't allowed to go as high... perhaps next time, lol.
