was pokemon a card game first The Hidden History of Pokemon's Trading Game! Opening THE FIRST Pokemon Cards
Description
Like other TCGs, the higher the rarity value, the more difficult it is to come across the cards when opening Booster Packs

This card doesnt look like anything special, but its so incredibly rare that sheer demand has caused it to rise in value over time
The only risk is getting your biggest creature removed in response (or getting its power shrunk, but no one plays those effects, right?)

You can do this once per day every 24 hours

1 Urborg, Tomb of Yawgmoth

You can also seek professional appraisal for the best results, especially if you have ultra-rare cards
