The Sorceress Xupreme

Here's a video of the deck being played by Web Warrior Fanatic against Expert Mr. Sinister:

https://www.youtube.com/watch?v=iG1V43lDdyo&t=3814s

Just an average X-Men Protection deck with 3 tough allies. Hopefully, you can cheat them in with Mutant Protectors on top of your deck via luck or Limbo. Why one copy of Pinned Down? If you attach it to a minion with 2 or less attack, you can use Mutant Protectors to cheat in Rockslide, Legion, or Rogue without taking any damage. The Protective Training will mainly be used on Rogue, Legion and Rockslide. Rogue will usually damage Rockslide/Polaris/Magik or Professor X/Colossus for big damage or thwarts, respectively. The damage on Colossus is useful to get him in the discard quicker, so you can put him back on top using Stepping Disc for the wild. Then you add him on top of your deck with Limbo and put him in play during the villain phase for 2 cost. There's a fair amount of mental resources and not tons of thwarting. So, you'll usually want to try and get out Magik's Crown and utilize Utopia to thwart, ready up after you play an ally, and then thwart again. You can also Stepping Disc to get additional thwarting. Legion, Scrying, Stepping Disc, Limbo, and Spiritual Meditation will allow you to manipulate the top of your deck to try and/or get the card you want to play at discount or symbols for upgrades/event kickers.