It's the End of the World, Can You Borrow Some San Value to Evolve?

It was the end of the world, and Lu Ming found that his body was a little strange. At the beginning, the eyes can collect San values ​​​​to open different spaces. Then, he drew the three-level spinal sword from his back. Later, he can transform into a super-large saw-man. "Doctor, is this the good thing you left in my body?"