Chapter 249 Door 7

Behind Gate 6 was Gate 7, which Charles quickly found. If Tuba was correct, then the relic should be inside.

"Sss—" Charles's Black Blade forcefully scraped across the wall, to his surprise, the sharp edge only left a crevice; the defense here was even more robust than he had imagined.

Back when he breached the Third Laboratory, he had used explosives to force his way through, but he guessed that if he used the same explosives here, they would probably be ineffective against this room.

Charles could feel his oxygen depleting, the pressure was on him to find a solution before he ran out, or the mission would be considered a complete failure.

"Bang!!" Charles fired his gun right at the door's lock, since the knife was ineffective, it was time to try the gun.

Seeing the white Bone Bullet sink into the metal door, he felt a surge of elation and began pulling the trigger relentlessly at the door.