Mask Transformation
Target 1 face-up 'Elemental HERO' monster you control and 1 'Masked HERO' in your Graveyard with the same Attribute as the field monster; it gains the effect of the selected 'Masked HERO' until the End Phase of your turn.
Mask Function 1
This card can only be activated if you control face-up "Masked HERO" on the field. Target 1 face-up monster on opponent field; its effects are negated as long as there are any "Masked HERO" monsters on the field.