How to find cards

[Darkassassin_21]

now ive kinda read some on this but i got bored casue i dont like to read,odd im on a posting web site lol, but i have wanted to know from the people who play this game way way more then i do is there a certain chance on finding real good cards...and im not much into the game and i dont understand it all to much but how to u figure out if a spell type cards is good or not or something that adds to your attack its just all confuseing to me maybe someone can clear it up becuase i would understand from someone else more then i would trying to figure it out on my own...but if there is a way to get good cards where can i get them how and so on and so forth...but thanks for the help