Understanding
Sam attacked the undead with all his strength, he didn't hold back.
Instantly, the expressions of the people changed. The moves of the shadow undead, they are very familiar. They have seen those moves clearly and have been seeing even a couple of minutes ago.
Rashma's shadow fought just like her, Sam's shadow fought just like him, and of course the opponent's shadow fought just like him.
This is a special constitutional ability of the opponent.
Sam knew of it. He has seen the other party practice this many times in the hub. The moment he saw it, he knew he had to study this technique. As for what exact this is…
The opponent's constitution allows him to become one with his shadow and access the shadow realm.
When he is in complete fusion with no restrictions, he will become an anchor point connecting the shadow realm and the realm of the living. The energy of the shadow realm leaks out, which is why the stage is changing in color.