User blog comment:Rizuko/Ibaraki Doji Returns?/@comment-98.246.108.106-20130617193202/@comment-10059816-20130617225148

My guess is special limited versions of starter daemons will be in rare, and special tanbata versions of older cards, and maybe a couple of new ones, will be ranking or tower rewards, depending on their rarity, since generally they keep the same skills or get better stats.