What a Fool! I Can Also Cultivate Immortality in the Mecha World!

This is an era of mechas where nuclear fusion energy is exhausted and resources are extremely scarce. Human civilization is lingering in the ruins of interstellar wars. Only by controlling giant mechas can we fight against the threats of alien zerg and interstellar pirates. The protagonist, an immortal cultivator from the earth, accidentally traveled to the bottom of this mecha civilization and possessed the body of a "junk guy" who was abandoned by his family and owned the lowest-level abandoned mecha. His golden finger is not a system in the traditional sense, but after he traveled through time, he discovered that the "spiritual energy" particles in this world are essentially the same as the "spiritual energy" he used to cultivate immortality in his previous life, and are even more abundant and pure. This means that he can drive the mecha with his immortality cultivation techniques, and even refine the core of the mecha into a magic weapon of his own. However, this system of cultivating immortals is incompatible with the technology tree of mecha civilization. Each of his breakthroughs is accompanied by unexplainable visions, attracting the attention of the "Temple" organization in charge of the core of energy and the "Mechanicus" who have a fanatical pursuit of life sciences. The core suspense is: when the power of cultivating immortals intervenes in the highly developed mecha civilization, will it completely subvert the existing order, or will it be regarded as a heresy and be devastated? And can the protagonist open up a new path to immortality in this barren world of mechas, and ultimately lead human civilization to transcend the shackles of mechas?