painbraker i just have some deck for play magic...for sure i dont have time for make tournament or something of realy serious...principaly i play for fun...if u see lot of cavern of soul or ancient zigurat is because i see it is a good card...if i have 2 deck whic comprend the same card, i move that card from one deck to the other one if i need...if i want make 2 or 3 of my deck that have this card...i buy only one set...any way...i think if i make the same deck buying booster pack i spend so much that buy every single card...
(sorry for my bad english)