Plus Mami swimsuit canvas art!
Given when Madoka Magica: Rebellion Story opened, it's not technically the first Halloween since Nagisa Momoe was introduced into the mahou shoujo crew. You couldn't tell from the Online game's eagerness to get her into a costume, celebrating with the rest of the girls. Already the cards with the holiday designs are making the rounds.
There are also pleasant chat cards
Speaking of alternative designs, Aniplex Plus has introduced special Mami swimsuit canvas art, selling for 3,000yen through the end of October.