It seems Flax is using a new avatar! Unblockable Purge on all enemies? I'm guessing the black text either contains something to narrow down it effect or something that can be of benefit to your enemies.
Look at the picture. It turns everybody into monsters. They draw monster cards instead of regular cards.
The name is too long for that. There is one letter that bends down with what looks to be a small loop. So a "g" probably, but could be a "j" or a "y"
I think we've actually stated this explicitly in the past, but yes, we are working on a set of items/cards, not a campaign expansion. At least for our next big release that is. We intend to keep developing the campaign over time
Cemetery Masquerade? Flaxative gave the hint that one of the topics in the Encyclopedia of Cardhuntria thread will be expanded upon. Considering he said the draining-heavy Nimble Nibbler won't be overpowered due to a change that the expansion will bring about, it's quite possible that topic is vampirism. Vampires, October, and the wearing of masks seem to go together. And it's been joked that the set will include lots of new helmet choices—perhaps masks?
Shamefully, the last time before today that I'd gone to campaign mode was before MM19 came out! So I can't take credit for that. I just figured it seemed appropriate to the time of year.