In the game of " fall back alliance " , players can upgrade the first three skills of a hero card, but each upgrade consumes a skill scroll at the equivalent level in addition to the gold coin, and a skill scroll at the third level is required if a player is to upgrade a skill to the third level. Players can fight at the level to acquire skill scroll fragments and synthesize skill scroll fragments or low skill scrolls into advanced skill scrolls in " synthetic-skill scroll scroll scrolls". If the player feels that the skill scrolls are too slow to be acquired at the level, the player can also travel to the challenge mountain event in challenge 40, after which he can draw a box of bravery to obtain a large amount of skill scroll fragments and skill scrolls at all levels. The heroes of the fall alliance come from three main camps: the near-range guard corps, the corps of natural disasters, the united nations legion, and the players who, in addition to ordinary and elite checkpoints, can also challenge the three camps to obtain cards from their counterparts and upgrade and evolve them. In addition to the above-mentioned camp cards, there are also special female cards in the " fall back alliance " , which are not only beautiful, but also very powerful, and are pursued by players. Cards get can be said to be of interest to every player. The spirit of war that can be gained through the completion of the expedition can be used to summon the heroes of blue and green, and the heroes of three camps can be called — natural disasters, proximity, alliances — and it is suggested that, when calling heroes, you should summon only one of the camp's heroes, who can easily grow cards later, a way that can be said to be a way to quickly acquire them. A portion of the blue and purple heroes can also be purchased from card dealers in the mall, whose purchase requires players to achieve a certain level of strength (power required at customs clearances, and a high 3-star power available for clearance without war damage). In addition, the ordinary book and the elite level were cut off, and copies of the hero boss at the elite level fell into purple cards。