Roll 'n' Boost Can be used each time your Life Points decrease by 2000. Show 1 monster card in your hand to the opponent and roll the die once. The Level of the monster shown becomes that of the die number untile the end of the turn.
The decklists on this website show the optimal deck build. If you don't have all the cards you can find cheaper substitutes such as Tribute Doll instead of Stray Lambs and Enchanted Javelin instead of Golden Apples.
then use a different deck, unfortunately there are other people out there that have the cards to build these decks and we appreciate good competitive deck lists, go build the "useful decks at early stages" if you don't have the resources to build proper decks yet instead of making comments about box resets & SR/UR card amounts, its ridiculous.
By "resources" you mean obscene amount of money to throw at a game?
Well, making expensive deck is fine and all that but don't try to pass it as a masterfully designed deck.
Well, I suppose for some people, money is always a good fill in for skills.