The sword was rising and falling; Kulus, who had assumed the role of a bully at the beginning of the conversation, now thought he was the Leader of the Red Claw Academy. The poison-protected mine was his, and the Sunshine Forest was his, and the overflowing energy resulted in new wounds opening up in Mel's body.
"No matter how beautiful it is, nothing is perfect. The high standards required to operate the Energy Crystal Mine make it possible for only Elemental Transformation Stage fighters to work.
If they fail to protect their bodies using nature's energy, even the Anti-Poison Pill cannot save them. Unless they transfer their elemental energies to specially crafted pickaxes, they cannot break the energy crystals out of their place.