What are the Yugioh serial numbers for obelisk the Tomentor Slifer the Sky Dragon and The Winged Dragon of Ra?

there isn't a serial number it just says This Card Cannot Be Used In A Duel.

--hey um u know how u say it ses it cannot be used in a duel what about the winged dragon a ra the serial number there is in japanese.

- That still says "This Card cannot be used in a duel" just in Japanese.