Cultivation of Immortality in Two Realms: Starting from the Formation Engineer

The Immortal Alliance lacks resources, but it has a complete industrial system for cultivating immortals accumulated over six thousand years. There are spiritual mines in the Lingshan Mountains all over the Xuantian Realm, but due to a disaster a thousand years ago, the civilization of cultivating immortals was severely disrupted. Others rely on fighting and killing to travel through time. After Shen Yan traveled through time, he discovered—— The monks here can't even practice the standard spirit gathering formation taught in the first grade of the school. Thus, an ordinary student majoring in Xianmeng Formation Engineering discovered for the first time: It turns out that knowledge can really be exchanged for spiritual stones. And it's very valuable.