Ji-woo actually realized that something was wrong with the stone gate because of the wicked Mana pressure implied by it. Somehow, his instincts were holding him back from doing anything.
If the stone gate got destroyed carelessly, the wicked Mana in it would absorb the dungeon into nothing. Even if he struck the Diffusal Blade, it would have no effect if Odulir didn't use his lightning hammer to hit the black layer of the stone gate.
"Have you taken care of those Green Goblins?"
"Look behind yourself."
Odulir turned his head and saw thousands of goblin corpses scattered with incomplete shapes. He also glanced at Ji-woo and thought that the person beside him was indeed the same as in the Magical world despite having a different stature.
"Then what are your plans to get us out of here!? Like I said before, I don't want to go back to Redredane! You have to take responsibility!"