From the publisher's website:
It’s time to take your dungeon to The Next Level!™ Return to the videogame-inspired world of Arcadia in Boss Monster 2.™ This all-new 160-card set plays as a standalone game or as an expansion to the best-selling original card game. -Become one of twelve new Bosses -Build powerful new Trap and Monster rooms -Cast Epic Spells -Face new challenges, including Hybrid Heroes and Dark Heroes Just like the original, Boss Monster 2 is designed for players of all skill levels. This set includes everything 2-4 players need for countless hours of dungeon-building fun. Combine it with the original Boss Monster and the possibilities are endless!