Like most Pokmon cards, the value of Latias 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)
But with a booster box of 36 packs, you increase your chances of a valuable rare Pokemon
What is "weighing"
Twenty cards isn't a lot when you consider there are well over 250 to collect
That being said, which of these is the best way to organize Pokemon cards in a binder
Undying (When this creature dies, if it had no +1/+1 counters on it, return it to the battlefield under its owner's control with a +1/+1 counter on it.) Creature - Zombie Color tag templates(None) Gravedigger When this creature enters, you may return target creature card from your graveyard to your hand