সাপ্পর্টেড অপারেটিং সিস্টেম:- or later
গেম এর ইন্টারফেসের ভাষা: Japanese
You should strengthen Mr. Bahamut with hand of the poker!

Bahamut card has nine ranks.
When the card is high rank, EXP which you can get at the time of strengthen it rises. The more difficult mission, the better Bahamut card you can obtain.