Blizzard's agile approach to "Hearthstone"

We're always on the look out for case studies of agile implementations. Here's one from an unexpected quarter:

"Everybody loves Hearthstone. Everybody is talking about Hearthstone. Everyone is playing Hearthstone. But when Blizzard veteran Eric Dodds said he wanted to make a digital card game instead of an MMO, some people within the company were a little puzzled. That all changed when he showed them what he built with a pen, paper and some envelopes stapled to his office wall."

Read about how he developed the entire game using small team, high-interaction, collaborative techniques led by prototyping and created one of the biggest underground smash games of recent times, in part helping drive recent iPad sales.