Unlock the philosophical layer of the ruined library. The fifth person can combine with them with three birds from the Black Forest. The whole war of liberation needs to go through four rounds of fighting, and each round of fighting has a special mechanism; Different from the previous liberation war, entering the next round of fighting will not restore health; The special bird-checking mechanism makes this liberation war need a certain intensity of output ability; Due to the spelling relationship between the fourth round of fighting and killing pages in multiple ranges, it is necessary to establish a strong light recovery page extraction card set.