C439 Entering the Tomb of Life and Death

"Because there is still one missing, three years ago, this place had once been sneakily entered by someone. As a result, another formation was added." As Old Man Liu spoke, he walked in front of the tombstone and fished out another jade slip. It looked exactly the same as the one on Dagger and he gently placed it inside. Immediately, a dark door appeared on top of the grave without a sound