The four of them walked through the passage they had passed before, and it seemed the place was still the same as the first time they had passed through the passage.
As if a flashback to the first time they sneaked into the Royal Castle, all flashes of memory seemed to flash back into their heads. Because they remember that at that time they entered the castle in hiding.
And they remember once the purpose of sneaking into the Royal Castle was to save the rainbow city residents still not infected by the touch of the Black Crystal.
Fortunately, at that time they still had time to save the residents of Rainbow City, although there were also most of the Rainbow City residents had been infected by the Black Crystal.
And now what's left are 17 people who used to be "Weapons," They have received special training from Xavier and three others to get a new nickname, "The Survivor."