Board Thread:News and Announcements/@comment-11654911-20150117170105/@comment-4630033-20150428211820

In part 2 of this discussion we generally decided it would be a Rare Riff, although it could probably fit to other monsters as well.

This is a tough teaser to predict from, however - because BBB is running out on rares to reveal to us, they are most likely trying to make the teasers harder to figure out.