In this event, the 12 DARK-type Valkyrie you have defeated will await you in each area of campaign, aiming to get their revenge! * During the event, there is a slight chance for the Dark Valkyrie you defeat to drop their own card. * If you defeat the 12 Dark Valkyrie in the specific order, you will receive another THANATOS card (it is possible to complete the list multiple times). * Plus, by fusing the SR ANGRA MAINYU that you can obtain by defeating archwitches with THANATOS, you can create a dark version of your Valkyrie Guardian (Oracle)!