Clock Wyvern (MP19-EN152) - 2019 Gold Sarcophagus Tin Mega Pack Unlimited

If this card is Normal or Special Summoned: You can halve this card's ATK, and if you do, Special Summon 1 "Clock Token" (Cyberse/WIND/Level 1/ATK 0/DEF 0). You can only use this effect of "Clock Wyvern" once per turn.