Fabian, known knight and noble loyal to the Emperor, shocked the world as he turned traitor, alongside six nobles in his rebellion, later known as the Six Devils. Against a grueling warfront and countless enemy soldiers, Fabian reaches Emperor Altair and kills him. The story of the murder is declared as "The Day of the Eclipse." You play as the son of Fabian, masquerading as a leader of a mercenary band, in order to find out the whereabouts of your father, and what truly caused his to turn traitor.
In battles you place your mercenaries on a grid, where they take turns either attacking, charging their spells, or buffing allies depending on their order. Fights are largely automated, some attacking the enemies in their row directly, attacking those in the back, or attacking in a pattern.
This game provides examples of:
- Action Bomb: Many of the undead mercenaries are used as suicidal attackers with a larger attack radius.
- Adam Smith Hates Your Guts: Some of the larger rewards in Mystic Island are exponentially higher than collecting shards.
- Fanservice: Many of the male and female mercenaries are in skintight suits, or low cut tops to show off skin.
- Fantasy Kitchen Sink: The world and your mercenary army can contain: monsters, devils, demons, undead bombers, elves, angels, beast people, and an old geezer.
- Fictional Currency: While you do use gold and diamonds for currency, there's also Mystic Dust for the Mystic Island trades.
- Gameplay and Story Segregation: Despite being summonable, many characters will interact with you in the story like you've just met.
- Item Farming: There are locations to grind crystals for ranking up and awakening mercenaries that rotate on a weekly basis.
- Play Every Day: Login bonuses ranging from EXP, Rank up materials, free 4* mercenaries, and Diamonds.