Here's the trailer for Knights of Badassdom, the comedy adventure movie in which Peter Dinklage, Summer Glau, True Blood's Ryan Kwanten, Steve Zahn, and Community's Danny Pudi enter the world of live-action role-playing... and then she-demons from hell show up.

We'll have a lot more details from the cast — which also includes Mad Men's Michael Gladis and It's Always Sunny in Philadelphia's Jimmi Simpson — and crew in the near future. But for now, bask in the sheer, unadulterated awesome of the movie's first trailer, in which some good clean (if somewhat drug-addled) fantasy role-playing takes a turn for the deadly serious when Steve Zahn recites a real succubus-summoning spell, prompting our heroes to unleash all manner of medieval badassery.