They will be talking about Theros, answering your questions, and talking about some of the stories from within R&D during the set's design and development.
Who: Sean Gibbons, Mark Rosewater, and Dave Humpherys
What: Twitch stream with R&D.
When: Thursday, September 19, 2013 - 3:00 p.m. PT to 4:00 p.m. PT
Why: Because we know you have lots of awesome questions!