Opening a full booster box will typically give you a strong base of commons, uncommons, and a healthy selection of rares and holos from the set, leaving you with a manageable list of remaining cards to track down individually
Its worth highlighting that not every deck wants land destruction, and its a tempo-negative play unless you wreck the whole board, including creatures and other permanents
Heart of the Blue-Eyes Heart of the Blue-Eyes Dragon Effect Control of this card cannot switch
The demand for lands is high because every competitive deck uses the same lands
Brood Keeper may very well have adopted them given some of the close ties between humans and dragons in Magic, and her flavor text makes it clear how much she loves her little beasties
Card Type: Effect Attribute: WIND Card Level: 7 Monster Type: Insect ATK: 2600 DEF: 1200 Card Number: DR3-EN190 Card Text: If this card was Special Summoned by the effect of "Ultimate Insect LV5", while it remains on the field all of your opponent's monsters lose 700 ATK and DEF