Master of Psychology

When the tip of Senior Scarlet Heaven Sword crossed through space, Song Shuhang immediately recognized its aura. After all, they had been together for so long. Then, without thinking, he asked, "Senior Scarlet Heaven Sword, have you gained weight?"

Senior Scarlet Heaven Sword said angrily, "Your sister gained weight! Idiot, how can a treasured sword like me gain weight?"

"..." Song Shuhang. 

Sorry, my sister hasn't been born yet.

Also, Senior Scarlet Heaven Sword, you've really grown larger. Before you left, you were still about the size of a one-handed sword, but now that you're back, you're as large as a greatsword. You've grown much beyond your previous size. What exactly did you just go through?

Senior Scarlet Heaven Sword continued, "I've evolved, understand?" Afterward, a pair of pure white arms drilled out of the spatial gate, and opened it a bit further.

"!!!" Song Shuhang.