Dragones y Sombras is the name of the deck of Pedro Eugenio Torres, a Top 4 finisher in the Masters Division of the 2018 World Championships. It is one of the 2018 World Championship Decks released November 14, 2018. Each deck comes with a Worlds 2018-deckbox, a Worlds 2018 pin, a booklet about the championships, and a TCGO code card. The cards included in the deck aren't the prints actually used in the decks, but are the most recent printing of the lowest rarity of the cards.
Rayquaza-GX, the star of the Sun & Moon—Celestial Storm expansion, got a lot of hype heading into Worlds, and Pedro had the best performance of any Rayquaza player, with a Top 4 in the Masters Division. Why all the hype? With its Dragon Break attack, Rayquaza-GX can do a whole lot of damage very quickly, especially paired with support cards like Max Elixir. And if you run out of Energy to attach, the Tempest-GX attack is pretty good at digging for more!