Thunder Mountain ◇
Lost Thunder

#191 Thunder Mountain ◇ - Lost Thunder (sm8)

Thunder Mountain ◇ is a Trainer card from the Sun & Moon series, released as part of the Lost Thunder set on November 2, 2018. It is classified as a Rare Prism Star rarity and features artwork by 5ban Graphics. The card functions as a Stadium card with unique rules that modify gameplay interactions. One rule reduces the cost of Lightning Pokémon attacks for both players. Another rule prevents effects from Item or Supporter cards played during the same turn. The card remains in play until another Stadium card is active, at which point it is discarded. It also enforces a restriction on having duplicate ◇ cards with the same name in the deck. Additionally, if a ◇ card would normally be discarded, it is instead placed in the Lost Zone.