I can rewind time to prevent death

A walking stick soon extended from inside the door and planted itself firmly on the ground, the hand gripping the dragon head handle was equally withered, the nails curved. An emaciated elderly man with a hunched back appeared in the doorway, but he did not step out completely, revealing only half of his body, with sparse hair and layers of wrinkles on his face, the eyeballs almost entirely obscured by eyelids, as if looking in Yan Junze's direction. Utter silence. In the entire square, there was not even the sound of wind, a complete stillness. "Elder? Are you there?" Yan Junze was not sure if the other party could understand him, he took a step forward, breaking the silence. The architecture here did not seem to be in Great Capital Huaying, and the elderly man's facial features were distinct yet indistinguishable due to extreme aging – it was impossible to tell whether this person was male or female, or even which resident of Great Capital they resembled. The old man did not respond to him. Yan Junze took a few more steps forward and asked, "Elder, may I ask where this place is?" He still could not understand why he had appeared here. But the old man remained silent, simply staring at him. At that moment, behind Yan Junze, blue-gray bricks shifted slightly, making a sound, and then one of them was slowly pushed up by something, during which dirt crumbled incessantly. Yan Junze also heard the sound from behind and immediately stopped walking. He did not turn around to check what it was right away, just then, the old man inside the bell tower stamped his walking stick hard on the ground and shouted with a hoarse voice, "Turn around! Turn your head around!" Yan Junze was startled, that phrase felt so familiar. By then, the brick behind him had been entirely lifted, something crawled out, and a sound of dragging across the ground followed, complemented by the scraping noise of some hard object on the bluestone bricks. Yet, Yan Junze did not turn around; his subconscious told him not to do so. The old man standing at the door of the bell tower seemed somewhat anxious, once again striking the ground with his stick, the metal-wrapped iron tip clashing against the ground with a loud crash. "Turn around! Quick, turn your head around! See what that is!" The old man's urgency, the strange sounds from behind, and the repeated "turn around" echoed insistently in Yan Junze's ears. Boom! At that moment, he suddenly realized, feeling heavy-headed and light-footed, his entire body dizzy. "I am dreaming, dammit, I am in a dream!" Yan Junze extended his right hand to his forehead, his head buzzing, and he strained his eyes to look at the bell tower in front of him and the emaciated old man standing at the doorway. The odd noise from behind drew closer, and the old man's lips continued to move, issuing the "turn around" prompt. Yan Junze, struggling against a suffocating discomfort weighing on his heart, thrust his left hand into his pocket. "Turn around!" The old man's voice resounded repeatedly in his mind like the tolling of a bell. The next second, the scraping sound from behind was right upon him. A black hand reached from behind and landed on Yan Junze's shoulder, its skin charred black, cracked all over, and pus oozed from the crevices. Of course, Yan Junze had no time to look. The moment the hand touched his shoulder, his left hand that had reached into his pocket had already found a Burst Nail. Without hesitation, he pressed down with his thumb on the sharp side of the pin. A sharp pain surged, as if his thumb was truly pricked by the Burst Nail. The pain caused Yan Junze to shiver, his eyes opened, and he found himself lying in the private room on the second floor of No. 7 Mansion, curled up on the makeshift chair from earlier, the blanket that had been covering his body now tightly wrapped around him, his hands tightly clutching the corners of the quilt edge. Lights were on in the private room, but it was empty, the window left open, and Xiang Er, who should have been standing by, was nowhere to be seen.