The card sticks to the leader's body and glowed with a bit of light before dissipating. No one knows what the card does and that's why Keon will take advantage of that
"You will not be able to say anything to anyone because I'm confident in my ability. The card just now contained a curse and I used it on you. Even Master Grade Mystics cannot lift this curse. If you bother me again or tell anyone what happened, you should be prepared to die immediately"
One's mystic form is unique. For example, there are a lot of sword users but they have different elemental applications. Even a sword that can produce fire will have some differences compared to the other swords that can do the same
The difference can be small or large and a mystic form cannot just be judged based on its appearance. There are mystic forms that have the physical manifestation of a spark of fire yet it can produce a flood of water