My dreams can simulate the future.

Jiang Chen, an ordinary ox or horse from Earth, is reincarnated into the cultivation world of Manglin Continent, becoming a low-level rogue cultivator in the Black Stone Mountain Market. Plagued by a chronic illness, plotted against by enemies, and facing imminent war, he is on the verge of death when the Dream Butterfly Map he brought with him finally awakens. Using the map's power, he can enter dreams to simulate the future. Drawing talismans is difficult, and failure results in resource loss? Simulating talisman drawing in dreams allows him to increase his strength without consuming any resources. Being assassinated by a powerful figure and unable to fight back? He can foresee the future in his dreams, lay a trap in advance, and turn the tables on his powerful enemy. Treasures appear and everyone scrambles for them? He can have foresight in his dreams and intercept them before they appear. Exploring dangerous places is fraught with peril, with a near-death experience? He can overcome obstacles in his dreams, figure out all the mechanisms, formations, and treasure locations, and easily obtain the treasure. Deducing cultivation techniques is fraught with danger, and the slightest carelessness could damage his foundation? He can deduce cultivation techniques in his dreams, and even after a thousand failures, he remains unharmed. Low success rate in Foundation Establishment? He attempted to break through to the Foundation Establishment stage ten or a hundred times in his dreams, accumulating experience and lessons. Even with a low success rate, he could still achieve Foundation Establishment. ... Relying on his dream-simulated precognition, Jiang Chen avoided death, explored new lands, cultivated various arts, deduced cultivation techniques and supernatural powers, and roamed the cultivation world, finally achieving immortality.