"As we all know, people in ancient times did not have magic cards. They always poured and retained magic power directly into their bodies for a long time before they could release various spells. Magic power seriously eroded the body, causing many ancient magics to be lost in the long river of history. It was not until humans invented magic cards to replace the human body as magic repeaters that it became common to steadily output magic power to cast magic, and a new era was opened!"
A fantasy card world.
