From personal experience, they seem to sell out of top-tier tournament playables quite often
You may put a creature card with mana value 4 or less from among them onto the battlefield
With the help of "Crimson Dragon", the card can be summoned during the opponent's turn, shutting off all of their effects
Main Collectable Card Games YuGiOh Counter Counter Counter Counter Card Type: Trap Attribute: TRAP Card Level: 3 Icon: Counter Card Number: TAEV-EN080 Card Text: Negate the activation of a Counter Trap Card, and destroy it
Great Tusk ex #72 Pokemon Promo Keep track of your collection value over time
Plus, things like Eldrazi Temple, Urza's Mine, Urza's Power Plant, and Urza's Tower for even more top-end and explosivness