As Long as I Pretend Enough, I Can Become Stronger.

This is an era where spiritual practice and mecha go hand in hand! Use the "general armor" made from the relics in the "relics" and the "arrow weapons" made from the demon brain core to compete with each other! The collision between civilizations, the intertwining of conspiracy and calculation! Let's see how the protagonist pretends to be the best in this chaotic era!