Pokémon Trading Card Game/Stadium Cards
Stadium Cards:
Stadium cards are used to give a player an extra bonus or special conditions. There can only be one stadium card during your play. However, you do not have to discard the stadium until you change into a new one. Also, if a stadium card is in your deck you can’t place it if you have a card that has the same as it that is in play. An example of an affect that happens is, “each Pokémon that has any fairy energy attached to it (both yours and your opponent’s) has no retreat cost” (Fairy Garden 100/124 Fates Collide).