A dot mark moves by itself and then vanishes.
Underground creator from the Philippines Arnel Renegado developed a unique gimmick that allows you to move a permanent dot mark by itself. Spectator selects a card and signs it no force. You then draw a dot fairly onto the back of their card,and put the deck on the table or the ground, mysteriously the dot moves slowly by itself after that you hand out the card for examination.
TWO endings either you vanish the dot or hand out the card with the dot for examination.