Core Set + Ironheart (Leadership)

I was thinking to myself, "I wonder if Ironheart is one of the best packs to get after the Core Set." She is just so fun without being over-complicated, and powerful without eclipsing anyone else.

So I thought "Could you effectively deck-build with her with just the Core Set? And could she take down the Core Set's great challenge, Expert Ultron?"

The answer is yes! I took down Expert Ultron with this deck on the first try.

Mainly, you pull the classic trick of recurring Hawkeye to deal with drones before they can damage you and Mockingbird to stun Ultron. But additionally, Ironheart in her final form is very well-equipped to burn down Ultron the turn you flip him to stage 3 or the turn after, with her limitless ceiling on progress counters for Maximum Efficiency and the potential for an 11-damage strike with Go All Out.

Make liberal use of "Go for Champions!" including the fact you can play it and attack or thwart with Brawn without damaging him. The single copy of First Aid is mainly for Brawn to keep him healthy and on the table so you can focus Make the Call on Hawkeye, Mockingbird, or Maria.

Have fun!