You may play only 1 Stadium card during your turn. Put it next to the Active Spot, and discard it if another Stadium comes into play. A Stadium with the same name can't be played.

Whenever a Pokémon (yours or your opponent's) is healed, double the amount of damage healed.

You cannot play this card by itself. You must combine 2 different Legendary Trench from your hand to play as 1 Stadium card.