Like most Pokmon cards, the value of Snorlax depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Twilight Masquerade)
And, with that new card in play, suddenly, a card that says Each player draws one card and then discards one card goes from being good for both of us to helping me more than it helps him
Cards x 10, Index x 3 Rarity Leader Card x 1, Super Rare x 2, Rare x 4, Uncommon x 2, Common x 6, Promotion Card x 1 *Due to the nature of the product, multiples of one card may appear, or it may be difficult to assemble a full set
it is quite easy to see why when we read its effect
This nets the five cards you're looking for, each with their most recent printing displayed
Booster openings deliver psychological satisfaction and social fun that raw efficiency can't quantify