Doctor X

In this deck, Doctor Stephen Strange uses the Seven Rings of Raggadorr to toughen up his buffed X-Men allies, who come into play with Attack Training since Danger Room isn't locked to X-Men heroes.

Wolverine with Attack Training, Enraged, and Boot Camp will attack for 7, and he'll soak the 3 consequential damage on the turns he's tough.

Likewise, Dust with the same setup can attack any number of minions for 5 damage and soak infinite consequential damage if she's tough.

This deck is best paired with an X-Men hero like Storm, who can run Utopia, more Training cards, more X-Men allies, and potentially Uncanny X-Men.

Here's a sample Storm build to partner with:

1x Angel 1x Beast 1x Colossus 1x Forge 1x Gentle 1x Havok 1x Mirage 1x Pixie

1x Clarity of Purpose 3x Danger Room Training 1x Deft Focus 3x Honorary X-Men 1x Rapid Response

1x Team-Building Exercise 1x Uncanny X-Men 1x Utopia 1x X-Jet

1x Band Together 1x Energy 1x Genius 1x Strength