Hello Josh,
Thank you for the comment and advices. It is really hard to check each method, each trick regarding similarity. It was my first trick idea, and there wasn't any influence by another tricks during creating this. In the future I will take care more about tricks history. Regarding the advantages of this trick, at the end the card can be taken out of my hand by the spectator, and I think changing only a little part of the card to another one can baffle the spectator more because in the reality there is no such a card.