Rainbow Kuriboh

You can only use 1 effect of "Rainbow Kuriboh"
per turn.
•When an opponent declares an attack, pay
{w}{w}{w}{w}; Equip this card from your hand
to an opponent's creature. That creature cannot
attack.
•When an opponent declares an attack, and
you have no untapped creatures, pay {w}{w};
Send this card from the Graveyard to the field,
and exile it when it leaves the field.