|Set:||Structure Deck: Emperor of Darkness|
|Card type:||Effect Monster|
You can only activate each effect of "Rainbow Kuriboh" once per turn. • When an opponent's monster declares an attack: You can target that attacking monster; equip this card from your hand to that monster. It cannot attack. • When an opponent's monster declares a direct attack while this card is in your Graveyard. You can Special Summon this card, but banish it when it leaves the field.