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, c...