You have a chance to get this pack whenever you complete a match against the AI, but expert battles are guaranteed to reward you with this pack, so it is a good idea to farm these matches to collect all the cards
You also have plenty of support for spellslinging wizards with cards like Flame of Anor, or for control decks with cards like Stern Scolding and Reprieve
Where Computer Search is pulling things from the deck, Dowsing Machine pulls from the discard pile
Sneaky "C" X EARTH Level 7 [ InsectEffect ] ATK 1300 DEF 2500 When your opponent Special Summons a monster(s) (except during the Damage Step): You can Special Summon this card from your hand in face-down Defense Position, and if you do, during the End Phase of this turn, change it to face-up Defense Position
A skilled player may favor a certain strategy, but more cards that support that approach will benefit the player in the end