Specifically, Thunderstone Advance: Towers of Ruin.
From BoardGameGeek:
In Thunderstone Advance you build your party of heroes to defeat the dreaded Thunderstone Bearers in their dungeons or wilderness. The player who defeats the most valuable monsters will win the day, but beware – those monsters have all-new tricks up their sleeves, and victory will not come easy.
I loved it! It was so much fun throwing down cards in this dungeon crawl. It was challenging to learn what every card did. But through the 3 or so rounds we played, I got used to seeing certain cards. I think future games will be really quick but loads of fun.