Did you ever visit Reveal.Diablo3.com to create an unique banner for the classes? If you did, now is the time to claim your reward!
Reveal.Diablo3.com (or "Darkness Falls, Heroes Rise" as its official title was) was a promotional site for Diablo 3 that appeared five weeks before game's launch and gave the fans to create unique banners for each class and earn in-game sigils, as well as help revealing the unlockable secrets at the website.
The site is long gone now and only leads to Diablo's official Battle.net page but those of you who got the chance to play with the banner creation procedure and who registered their Battle.net account can now log in to receive the Feats of Strength achievements for each class they created a banner for and claim their banner sigils.
