Traveling to the world of immortals, Lin Feng found that his right eye could upgrade the formation infinitely. The story begins when Lin Feng got the first stone-exploring formation. Rock Exploration——From the environment within a radius of three feet, perceive the specified minerals of the first-level quality or less contained in it, and indicate its direction and position.] [Note: The first-level low-grade mineral spirit iron has been designated in the mineral tank.] [Unlockable Relevant pattern knowledge:] [1: The diameter of the perception range is expanded to ten feet. (Two pieces of spirit stone fragments are spent)] [2: An additional mineral slot is added, which can sense two kinds of minerals at the same time. (Five spirit stone fragments are spent) ] [3: The maximum level of perceived minerals has been raised to the second level. (Ten second-level middle-grade spirit stones are spent)] [4: Unknown function. (One spirit stone fragment is required to find out)] [Introduction: I am lucky Little Miner.] Book Friends Group: 594039322 (Welcome to the group to discuss the plot)