VARefar, the Judge of Ball

When your opponent activates a monster effect on their field that targets a monster(s) you control, or their monster targets one for an attack (Quick Effect): You can Special Summon this card from your hand, then you can choose 1 of those opponent's monsters and reveal 1 card in your hand, then apply the following effect to that monster based on the revealed card type.
● Monster: Change it to Defense Position. ● Spell: Double its ATK. ● Trap: Banish it.
You can only use this effect of "VARefar, the Judge of Ball" once per turn.