Mythic Days     Note: All Koban Costs are given for HH.com. For Nutaku, values should be divided by 6. For example, a Mythic Booster costs 540 Kobans on HH.com, and 540/6=90 on Nutaku. This guide focuses specifically on free-to-play players. Buying season pass or Kobans can make the event easier, but it is by no means necessary.          Event Description              Mythic Days (MD) is a monthly event, during which you can obtain a "Mythic Girl". These girls are currently the stro