Karakuri Gama Oil

Activate this card by targeting 1 "Karakuri" monster in your GY; Special Summon it and equip it with this card. Once per turn, if the battle position of a face-up "Karakuri" monster(s) you control is changed: The equipped monster gains 500 ATK/DEF (even if this card is no longer equipped). You can only activate 1 "Karakuri Gama Oil" per turn.