Like most Pokmon cards, the value of Rayquaza-EX 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 (XY Black Star Promos)
As seen in Frank Karsten's Metagame Mentor from July 13, most of the best Pioneer decks in July were also among the best-performing archetypes at last year's Regional Championships and Pro Tour Phyrexia
NM-Mint, English, 3 In Stock Light Play, English, 0 In Stock Moderate Play, English, 0 In Stock Heavy Play, English, 0 In Stock Damaged, English, 0 In Stock Cannot be sold internationally
Keep in mind that the game is over in case the Life card pile ends and the Leader performs a successful attack
It gains protection from everything until your next turn
Most new Pokemon experience the same thing, and this pattern is a normal occurrence