Gearspring Spirit

Effect Monster · Machine · DARK · ★8

ATK 100/DEF 100

“Cannot be Normal Summoned/Set. Must first be Special Summoned (from your hand) by having only Machine-Type monsters in your Graveyard (min. 1). Once per turn: You can target 1 face-up monster your opponent controls; its ATK becomes 0 until the End Phase.”