[SHVI] Floating Ghost & Winter Cherry

During either player's turn, if your opponent controls more monsters than you do: You can discard this card; reveal 1 card from your Extra Deck, then look at your opponent's Extra Deck, and if they have a card(s) with the same name as the revealed card, banish all cards with that name from their Extra Deck. You can only use this effect of "Floating Ghost & Cherry Blossom" once per turn.