I Click on the Technology Tree at the End of the World

On the seventh day after the spiritual tide came, engineer Chen Xu picked up a black stone in the ruins of the laboratory. Blackstone said: I am the seed left behind before the last universe returned to zero. The tree lights up. The first branch reads - Spirit Gathering Array·Principle (deduction degree 0%). There are still 179 minutes left for the beast tide to arrive. From the direction of the city center, an artificial signal that should not exist in this world was transmitted. Later, Chen Xu learned that there were Level 1 to Level 7 civilizations in the universe, and people like him who picked up seeds were called tree keepers.