evolutions booster box sealed Pokemon XY Mega Evolve Your Strength to the Next Stage Pokemon - XY Evolutions Booster

2) Distorted Giratina Card: Giratina V #186 If you have some extra cash saved up and are willing to risk it all for your Valentine, consider this full-art Giratina card

Once per turn, when exactly 1 other Pendulum Monster you control (and no other cards) is returned to your hand by an opponent's card effect (except during the Damage Step): You can Special Summon 1 monster from your hand with the same name as that returned to the hand

over 30 billion cards have been sold worldwide since the games initial release

The fact they also contain a booster allows you to start deck building as well, but you will need to buy more to make the decks competitive