Tons of things for the 1 Year Anniversary of the global release has been going on, with daily special log-in rewards, half draw Relic banners, 50 Mythril giveaways, the rotating dungeons for Orb Fests, and some Super Soul Break banner phases beginning.
But that's not all! They have now unleashed the Nightmare dungeons on us, which are supposed to be the toughest dungeons yet (and will rotate once a month) to unlock 6* abilities and resources. The first one is to win Ultima and will allow most 5* Black Magic characters to attain 6* use status on completion.
Be warned. They are tough though.