The Age of Machine Swords

This world contains an element called Zero Formula, the source of supernatural power.

Some gifted humans can absorb Zero Formula elements through meditation. Once enough of these elements accumulate in the body, they can open a Zero Formula pool within themselves.

When the pool is opened, the Zero Formula elements already accumulated in the body begin to organize themselves, forming a Zero Formula main chain inside it.

When a mech-swordsman activates the Zero Formula main chain, a basic mech-sword manifests in the real world. This is the starting point for all mech-swordsmen.