Hall of Gemstone [Mirage] Basic Land and either add it to

and either add it to your hand or attach it to this card as material

defending player exiles the top twenty cards of their library

and one from that "something new and surprising" group of R&D Playtest cards:

Discover awesome Pokémon and mysterious treasures in the Pokémon TCG: Sun & Moon—Forbidden Light expansion

A 75-card decks that is ready to play out of the box

Hall of Gemstone [Mirage] Basic Land and either add it toSet: Mirage Type: World Enchantment Rarity: Rare Cost: {1}{G}{G} At the beginning of each player's upkeep, that player chooses a color. Until end of turn, lands tapped for mana produce mana of the chosen color instead of any other color.