It cost him 1,500 energy stones to purchase, which is 50% more expensive than usual. This is because the Copper Body Metac is a rare Metac that adds permanent power to cultivators, which they can use without internal energy.
All he will need to use this Branch Metac is a lot of internal energy and a lot of copper. The Copper Body Metac needs the internal energy to work, and it will need the copper to transform its body.
The total amount of copper that he will need to upgrade his body to the peak of rank 1 will cost a maximum of 500 energy stones. It might even cost less than this since his body is already above average at 0.6 units.
This amount of money isn't worth mentioning to him at all. Even if it cost 5,000 energy stones, he would be able to afford it.
So it will cost him 2,000 energy stones to strengthen his body. As expensive as this is, it will be worth it because the metallic body will increase his survivability.
