Mint — the living sketch
The paper is blank, but faces are waiting inside it. Draw one unlifted line — every 500 units of unbroken stroke summons a feature beside your pencil (an eye, an ear, a mouth). Crossing your own line seals the summons. Up to 5 faces per sketch, and the paper decides which are free.
draw one unbroken line — the face follows your pencil
Draw one line on the sheet — the paper asks for proof of hand before it mints.